Document:

EXHIBIT 4-o

                           [FORM OF FACE OF SECURITY]
                        FLOATING/FIXED RATE SENIOR NOTE

REGISTERED                                                    REGISTERED
No. FLR/FX                                                    [PRINCIPAL AMOUNT]
                                                              CUSIP:

     Unless this certificate is presented by an authorized representative of
The Depository Trust Company (55 Water Street, New York, New York) to the
issuer or its agent for registration of transfer, exchange or payment, and any
certificate issued is registered in the name of Cede & Co. or such other name
as requested by an authorized representative of The Depository Trust Company
and any payment is made to Cede & Co., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF
FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL since the registered
owner hereof, Cede & Co., has an interest herein.(1)

--------

    (1)    Applies only if this Note is a Registered Global Security.

<PAGE>

                                         MORGAN STANLEY DEAN WITTER & CO.
                                     SENIOR GLOBAL MEDIUM-TERM NOTE, SERIES C
                                               (Floating/Fixed Rate)

<TABLE>

<S>                                    <C>                                    <C>
BASE RATE:                             ORIGINAL ISSUE DATE:                   MATURITY DATE:
---------------------------------------------------------------------------------------------------------
INDEX MATURITY:                        INTEREST ACCRUAL DATE:                 INTEREST PAYMENT DATE(S):
---------------------------------------------------------------------------------------------------------
SPREAD (PLUS OR MINUS):                INITIAL INTEREST RATE:                 INTEREST PAYMENT PERIOD:
---------------------------------------------------------------------------------------------------------
SPREAD MULTIPLIER:                     INITIAL INTEREST RESET                 INTEREST RESET PERIOD:
                                          DATE:
---------------------------------------------------------------------------------------------------------
REPORTING SERVICE:                     MAXIMUM INTEREST RATE:                 INTEREST RESET DATE(S):
---------------------------------------------------------------------------------------------------------
INDEX CURRENCY:                        MINIMUM INTEREST RATE:                 CALCULATION AGENT:
---------------------------------------------------------------------------------------------------------
FIXED RATE COMMENCEMENT                INITIAL REDEMPTION DATE:               SPECIFIED CURRENCY:
   DATE:
---------------------------------------------------------------------------------------------------------
FIXED INTEREST RATE:                   INITIAL REDEMPTION                     IF SPECIFIED CURRENCY
                                          PERCENTAGE:                            OTHER THAN U.S. DOLLARS,
                                                                                 OPTION TO ELECT PAYMENT
                                                                                 IN U.S. DOLLARS:  [YES]2
---------------------------------------------------------------------------------------------------------
EXCHANGE RATE AGENT:                   ANNUAL REDEMPTION                      DESIGNATED CMT TELERATE
                                          PERCENTAGE REDUCTION:                  PAGE:
---------------------------------------------------------------------------------------------------------
                                       OPTIONAL REPAYMENT                     DESIGNATED CMT MATURITY
                                          DATE(S):                               INDEX:
---------------------------------------------------------------------------------------------------------
OTHER PROVISIONS:                      REDEMPTION NOTICE PERIOD:(3)
---------------------------------------------------------------------------------------------------------
                                       TAX REDEMPTION AND
                                       PAYMENT OF ADDITIONAL
                                       AMOUNTS: NO(4)
---------------------------------------------------------------------------------------------------------
                                       IF YES, STATE INITIAL
                                         OFFERING DATE: N/A
---------------------------------------------------------------------------------------------------------
</TABLE>

     Morgan Stanley Dean Witter & Co., a Delaware corporation (together with
its successors and assigns, the "Issuer"), for value received, hereby promises
to pay to                      , or

--------

    (2)   Applies if this is a Registered Global Security, unless new
          arrangements are made with DTC outside of existing Letters of
          Representations.

    (3)   Applicable if other than 30-60 calendar days. If this is a Registered
          Global Security, minimum notice period is [20] calendar days [current
          DTC limitation].

    (4)   Default provision is NO. Indicate YES only for certain notes issued
          on a global basis if specified in pricing supplement.

                                       2

<PAGE>

registered assignees, the principal [sum of ](5) [amount specified in Schedule
A hereto](6) on the Maturity Date specified above (except to the extent
redeemed or repaid prior to the maturity) and to pay interest thereon from the
Interest Accrual Date specified above at a rate per annum equal to the Initial
Interest Rate specified above until the Initial Interest Reset Date specified
above, and thereafter at a rate per annum determined in accordance with the
provisions specified on the reverse hereof until the principal hereof is paid
or duly made available for payment. The Issuer will pay interest in arrears
weekly, monthly, quarterly, semiannually or annually as specified above as the
Interest Payment Period on each Interest Payment Date (as specified above),
commencing with the first Interest Payment Date next succeeding the Interest
Accrual Date specified above, and on the Maturity Date (or any redemption or
repayment date); provided, however, that if the Interest Accrual Date occurs
between a Record Date, as defined below, and the next succeeding Interest
Payment Date, interest payments will commence on the second Interest Payment
Date succeeding the Interest Accrual Date to the registered holder of this Note
on the Record Date with respect to such second Interest Payment Date; provided,
further, that if, during any period prior to the Fixed Rate Commencement Date,
an Interest Payment Date (other than the Maturity Date or a redemption or
repayment date) would fall on a day that is not a Business Day, as defined on
the reverse hereof, such Interest Payment Date shall be the following day that
is a Business Day, except that if the Base Rate specified above is LIBOR or
EURIBOR and such next Business Day falls in the next calendar month, such
Interest Payment Date shall be the immediately preceding day that is a Business
Day; and provided, further, that if the Maturity Date or redemption or
repayment date would fall on a day that is not a Business Day, such payment
shall be on the following day that is a Business Day and no interest shall
accrue for the period from and after such Maturity Date or redemption or
repayment date; and provided, further, that if, during any period on or after
the Fixed Rate Commencement Date, an Interest Payment Date or the Maturity Date
or redemption or repayment date would fall on a day that is not a Business Day,
payment of interest, premium, if any, or principal otherwise payable on such
date need not be made on such date, but may be made on the next succeeding
Business Day with the same force and effect as if made on the Interest Payment
Date or on the Maturity Date or redemption or repayment date, and no interest
on such payment shall accrue for the period from and after the Interest Payment
Date or the Maturity Date or redemption or repayment date to such next
succeeding Business Day.

         Interest on this Note will accrue from and including the most recent
date to which interest has been paid or duly provided for, or, if no interest
has been paid or duly provided for, from and including the Interest Accrual
Date, until but excluding the date the principal hereof has been paid or duly
made available for payment. The interest so payable, and punctually paid or
duly provided for, on any Interest Payment Date will, subject to certain
exceptions described herein, be paid to the person in whose name this Note (or
one or more predecessor Notes) is registered at the close of business on the
date 15 calendar days prior to such Interest Payment Date (whether or not a
Business Day (as defined below)) (each such date, a "Record Date"); provided,
however, that interest payable at maturity (or any redemption or repayment
date) will be payable to the person to whom the principal hereof shall be
payable.

--------

    (5)   Applies if this Note is not issued as part of, or in relation to, a
          Unit.

    (6)   Applies if this Note is issued as part of, or in relation to, a Unit.

                                       3

<PAGE>

         Payment of the principal of and premium, if any, and interest due at
maturity on this Note (or any redemption or repayment date), unless this Note
is denominated in a Specified Currency other than U.S. dollars and is to be
paid in whole or in part in such Specified Currency, will be made in
immediately available funds upon surrender of this Note at the office or agency
of the Paying Agent, as defined on the reverse hereof, maintained for that
purpose in the Borough of Manhattan, The City of New York, or at such other
paying agency as the Issuer may determine, in U.S. dollars. U.S. dollar
payments of interest, other than interest due at maturity or any date of
redemption or repayment, will be made by U.S. dollar check mailed to the
address of the person entitled thereto as such address shall appear in the Note
register. A holder of U.S. $10,000,000 (or the equivalent in a Specified
Currency) or more in aggregate principal amount of Notes having the same
Interest Payment Date, the interest on which is payable in U.S. dollars, will
be entitled to receive payments of interest, other than interest due at
maturity or on any date of redemption or repayment, by wire transfer of
immediately available funds if appropriate wire transfer instructions have been
received by the Paying Agent in writing not less than 15 calendar days prior to
the applicable Interest Payment Date.

         If this Note is denominated in a Specified Currency other than U.S.
dollars, and the holder does not elect (in whole or in part) to receive payment
in U.S. dollars pursuant to the next succeeding paragraph, payments of
principal, premium, if any, and interest with regard to this Note will be made
by wire transfer of immediately available funds to an account maintained by the
holder hereof with a bank located outside the United States if appropriate wire
transfer instructions have been received by the Paying Agent in writing [not
less than 15 calendar days prior to the applicable payment date](7) [, with
respect to payments of interest, on or prior to the fifth Business Day after
the applicable Record Date and, with respect to payments of principal or any
premium, at least ten Business Days prior to the Maturity Date or any
redemption or repayment date, as the case may be](8); provided that, if payment
of interest, principal or any premium with regard to this Note is payable in
euro, the account must be a euro account in a country for which the euro is the
lawful currency, provided, further, that if such wire transfer instructions are
not received, such payments will be made by check payable in such Specified
Currency mailed to the address of the person entitled thereto as such address
shall appear in the Note register; and provided, further, that payment of the
principal of this Note, any premium and the interest due at maturity (or on any
redemption or repayment date) will be made upon surrender of this Note at the
office or agency referred to in the preceding paragraph.

         If so indicated on the face hereof, the holder of this Note, if
denominated in a Specified Currency other than U.S. dollars, may elect to
receive all or a portion of payments on this Note in U.S. dollars by
transmitting a written request to the Paying Agent, on or prior to the fifth
Business Day after such Record Date or at least ten Business Days prior to the
Maturity Date or any redemption or repayment date, as the case may be. Such
election shall remain in effect unless such request is revoked by written
notice to the Paying Agent as to all or a portion of payments on this Note at
least five Business Days prior to such Record Date, for payments of interest,
or at least ten
--------

    (7)   Applies for a Registered Note that is not in global form.

    (8)   Applies only for a Registered Global Security.

                                       4

<PAGE>

calendar days prior to the Maturity Date or any redemption or repayment date,
for payments of principal, as the case may be.

         If the holder elects to receive all or a portion of payments of
principal of and premium, if any, and interest on this Note, if denominated in
a Specified Currency other than U.S. dollars, in U.S. dollars, the Exchange
Rate Agent (as defined on the reverse hereof) will convert such payments into
U.S. dollars. In the event of such an election, payment in respect of this Note
will be based upon the exchange rate as determined by the Exchange Rate Agent
based on the highest bid quotation in The City of New York received by such
Exchange Rate Agent at approximately 11:00 a.m., New York City time, on the
second Business Day preceding the applicable payment date from three recognized
foreign exchange dealers (one of which may be the Exchange Rate Agent unless
such Exchange Rate Agent is an affiliate of the Issuer) for the purchase by the
quoting dealer of U.S. dollars for the Specified Currency for settlement on
such payment date in the amount of the Specified Currency payable in the
absence of such an election to such holder and at which the applicable dealer
commits to execute a contract. If such bid quotations are not available, such
payment will be made in the Specified Currency. All currency exchange costs
will be borne by the holder of this Note by deductions from such payments.

         Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         Unless the certificate of authentication hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Note
shall not be entitled to any benefit under the Senior Indenture, as defined on
the reverse hereof, or be valid or obligatory for any purpose.

                                       5

<PAGE>

         IN WITNESS WHEREOF, the Issuer has caused this Note to be duly
executed.

DATED:                                MORGAN STANLEY DEAN WITTER & CO.

                                      By:________________________________
                                         Name:
                                         Title:

TRUSTEE'S CERTIFICATE
     OF AUTHENTICATION

This is one of the Notes referred
     to in the within-mentioned
     Subordinated Indenture.

JPMORGAN CHASE BANK,
     as Trustee

By:_________________________________
     Authorized Officer

                                       6

<PAGE>

                         [FORM OF REVERSE OF SECURITY]

         This Note is one of a duly authorized issue of Senior Global
Medium-Term Notes, Series C, having maturities more than nine months from the
date of issue (the "Notes") of the Issuer. The Notes are issuable under an
Amended and Restated Senior Indenture, dated as of May 1, 1999, between the
Issuer and JPMorgan Chase Bank (formerly known as The Chase Manhattan Bank), as
Trustee (the "Trustee," which term includes any successor trustee under the
Senior Indenture) (as may be amended or supplemented from time to time, the
"Senior Indenture"), to which Senior Indenture and all indentures supplemental
thereto reference is hereby made for a statement of the respective rights,
limitations of rights, duties and immunities of the Issuer, the Trustee and
holders of the Notes and the terms upon which the Notes are, and are to be,
authenticated and delivered. The Issuer has appointed JPMorgan Chase Bank at
its corporate trust office in The City of New York as the paying agent (the
"Paying Agent," which term includes any additional or successor Paying Agent
appointed by the Issuer) with respect to the Notes. The terms of individual
Notes may vary with respect to interest rates, interest rate formulas, issue
dates, maturity dates, or otherwise, all as provided in the Senior Indenture.
To the extent not inconsistent herewith, the terms of the Senior Indenture are
hereby incorporated by reference herein.

         Unless otherwise indicated on the face hereof, this Note will not be
subject to any sinking fund and, unless otherwise provided on the face hereof
in accordance with the provisions of the following three paragraphs, will not
be redeemable or subject to repayment at the option of the holder prior to
maturity.

         If so indicated on the face hereof, this Note may be redeemed in whole
or in part at the option of the Issuer on or after the Initial Redemption Date
specified on the face hereof on the terms set forth on the face hereof,
together with interest accrued and unpaid hereon to the date of redemption.

         If this Note is subject to "Annual Redemption Percentage Reduction,"
the Initial Redemption Percentage indicated on the face hereof will be reduced
on each anniversary of the Initial Redemption Date by the Annual Redemption
Percentage Reduction specified on the face hereof until the redemption price of
this Note is 100% of the principal amount hereof, together with interest
accrued and unpaid hereon to the date of redemption. Notice of redemption shall
be mailed to the registered holders of the Notes designated for redemption at
their addresses as the same shall appear on the Note register not less than 30
nor more than 60 calendar days prior to the date fixed for redemption or within
the Redemption Notice Period specified on the face hereof, subject to all the
conditions and provisions of the Senior Indenture. In the event of redemption
of this Note in part only, a new Note or Notes for the amount of the unredeemed
portion hereof shall be issued in the name of the holder hereof upon the
cancellation hereof.

         If so indicated on the face of this Note, this Note will be subject to
repayment at the option of the holder on the Optional Repayment Date or Dates
specified on the face hereof on the terms set forth herein. On any Optional
Repayment Date, this Note will be repayable in whole or in part in increments
of $1,000 or, if this Note is denominated in a Specified Currency other than
U.S. dollars, in increments of 1,000 units of such Specified Currency (provided
that any remaining principal amount hereof shall not be less than the minimum
authorized denomination hereof) at the option of

                                       7

<PAGE>

the holder hereof at a price equal to 100% of the principal amount to be
repaid, together with interest accrued and unpaid hereon to the date of
repayment. For this Note to be repaid at the option of the holder hereof, the
Paying Agent must receive at its corporate trust office in the Borough of
Manhattan, The City of New York, at least 15 but not more than 30 calendar days
prior to the date of repayment, (i) this Note with the form entitled "Option to
Elect Repayment" below duly completed or (ii) a telegram, telex, facsimile
transmission or a letter from a member of a national securities exchange or the
National Association of Securities Dealers, Inc. or a commercial bank or a
trust company in the United States setting forth the name of the holder of this
Note, the principal amount hereof, the certificate number of this Note or a
description of this Note's tenor and terms, the principal amount hereof to be
repaid, a statement that the option to elect repayment is being exercised
thereby and a guarantee that this Note, together with the form entitled "Option
to Elect Repayment" duly completed, will be received by the Paying Agent not
later than the fifth Business Day after the date of such telegram, telex,
facsimile transmission or letter; provided, that such telegram, telex,
facsimile transmission or letter shall only be effective if this Note and form
duly completed are received by the Paying Agent by such fifth Business Day.
Exercise of such repayment option by the holder hereof shall be irrevocable. In
the event of repayment of this Note in part only, a new Note or Notes for the
amount of the unpaid portion hereof shall be issued in the name of the holder
hereof upon the cancellation hereof.

         This Note will bear interest at the rate determined in accordance with
the applicable provisions below by reference to the Base Rate shown on the face
hereof based on the Index Maturity, if any, shown on the face hereof (i) plus
or minus the Spread, if any, and/or (ii) multiplied by the Spread Multiplier,
if any, specified on the face hereof. Commencing with the Initial Interest
Reset Date specified on the face hereof, the rate at which interest on this
Note is payable shall be reset as of each Interest Reset Date specified on the
face hereof (as used herein, the term "Interest Reset Date" shall include the
Initial Interest Reset Date). The determination of the rate of interest at
which this Note will be reset on any Interest Reset Date shall be made on the
Interest Determination Date (as defined below) pertaining to such Interest
Reset Dates; provided, however, that (i) the interest rate in effect for the
period from the Interest Accrual Date to the Initial Interest Reset Date will
be the Initial Interest Rate and (ii) the interest rate in effect commencing on
and including the Fixed Rate Commencement Date to the Maturity Date hereof
shall be the Fixed Interest Rate, if such rate is specified on the face hereof,
or if no such Fixed Interest Rate is so specified, the interest rate in effect
hereon on the day immediately preceding the Fixed Rate Commencement Date. If
any Interest Reset Date would otherwise be a day that is not a Business Day,
such Interest Reset Date shall be postponed to the next succeeding day that is
a Business Day, except that if the Base Rate specified on the face hereof is
LIBOR or EURIBOR and such Business Day is in the next succeeding calendar
month, such Interest Reset Date shall be the immediately preceding Business
Day. As used herein, "Business Day" means any day, other than a Saturday or
Sunday, (a) that is neither a legal holiday nor a day on which banking
institutions are authorized or required by law or regulation to close (x) in
The City of New York or (y) if this Note is denominated in a Specified Currency
other than U.S. dollars, euro or Australian dollars, in the principal financial
center of the country of the Specified Currency, or (z) if this Note is
denominated in Australian dollars, in Sydney and (b) if this Note is
denominated in euro, that is also a day on which the Trans-European Automated
Real-time Gross Settlement Express Transfer System ("TARGET") is operating (a
"TARGET Settlement Day").

                                       8

<PAGE>

         The Interest Determination Date pertaining to an Interest Reset Date
for Notes bearing interest calculated by reference to the CD Rate, Commercial
Paper Rate, Federal Funds Rate, Prime Rate and CMT Rate will be the second
Business Day next preceding such Interest Reset Date. The Interest
Determination Date pertaining to an Interest Reset Date for Notes bearing
interest calculated by reference to EURIBOR (or to LIBOR when the Index
Currency is euros) shall be the second TARGET Settlement Day preceding such
Interest Reset Date. The Interest Determination Date pertaining to an Interest
Reset Date for Notes bearing interest calculated by reference to LIBOR (other
than for LIBOR Notes for which the Index Currency is euros), shall be the
second London Banking Day preceding such Interest Reset Date, except that the
Interest Determination Date pertaining to an Interest Reset Date for a LIBOR
Note for which the Index Currency is pounds sterling will be such Interest
Reset Date. As used herein, "London Banking Day" means any day on which
dealings in deposits in the Index Currency (as defined herein) are transacted
in the London interbank market. The Interest Determination Date pertaining to
an Interest Reset Date for Notes bearing interest calculated by reference to
the Treasury Rate shall be the day of the week in which such Interest Reset
Date falls on which Treasury bills normally would be auctioned; provided,
however, that if as a result of a legal holiday an auction is held on the
Friday of the week preceding such Interest Reset Date, the related Interest
Determination Date shall be such preceding Friday; and provided, further, that
if an auction shall fall on any Interest Reset Date, then the Interest Reset
Date shall instead be the first Business Day following the date of such
auction.

         Unless otherwise specified on the face hereof, the "Calculation Date"
pertaining to an Interest Determination Date will be the earlier of (i) the
tenth calendar day after such Interest Determination Date or, if such day is
not a Business Day, the next succeeding Business Day, or (ii) the Business Day
preceding the applicable Interest Payment Date or Maturity Date (or, with
respect to any principal amount to be redeemed or repaid, any redemption or
repayment date), as the case may be.

         Determination of CD Rate. If the Base Rate specified on the face
hereof is the "CD Rate," for any Interest Determination Date, the CD Rate with
respect to this Note shall be the rate on that date for negotiable certificates
of deposit having the Index Maturity specified on the face hereof as published
by the Board of Governors of the Federal Reserve System in "Statistical Release
H.15(519), Selected Interest Rates," or any successor publication of the Board
of Governors of the Federal Reserve System ("H.15(519)") under the heading "CDs
(Secondary Market)."

         The following procedures shall be followed if the CD Rate cannot be
determined as described above:

           (i) If the above rate is not published in H.15(519) by 9:00 a.m.,
New York City time, on the Calculation Date, the CD Rate shall be the rate on
that Interest Determination Date set forth in the daily update of H.15(519),
available through the world wide website of the Board of Governors of the
Federal Reserve System at http://www.federalreserve.gov/releases/h15/current,
or any successor site or publication ("H.15 Daily Update") for the Interest
Determination Date for certificates of deposit having the Index Maturity
specified on the face hereof, under the caption "CDs (Secondary Market)."

                                       9

<PAGE>

          (ii) If the above rate is not yet published in either H.15(519) or
the H.15 Daily Update by 3:00 p.m., New York City time, on the Calculation
Date, the Calculation Agent shall determine the CD Rate to be the arithmetic
mean of the secondary market offered rates as of 10:00 a.m., New York City
time, on that Interest Determination Date of three leading nonbank dealers in
negotiable U.S. dollar certificates of deposit in The City of New York selected
by the Calculation Agent (after consultation with the Issuer) for negotiable
certificates of deposit of major United States money center banks of the
highest credit standing in the market for negotiable certificates of deposit
with a remaining maturity closest to the Index Maturity specified on the face
hereof in an amount that is representative for a single transaction in that
market at that time.

         (iii) If the dealers selected by the Calculation Agent are not quoting
as set forth above, the CD Rate for that Interest Determination Date shall
remain the CD Rate for the immediately preceding Interest Reset Period, or, if
there was no Interest Reset Period, the rate of interest payable shall be the
Initial Interest Rate.

         Determination of Commercial Paper Rate. If the Base Rate specified on
the face hereof is the "Commercial Paper Rate," for any Interest Determination
Date, the Commercial Paper Rate with respect to this Note shall be the Money
Market Yield (as defined herein), calculated as described below, of the rate on
that date for commercial paper having the Index Maturity specified on the face
hereof, as that rate is published in H.15(519), under the heading "Commercial
Paper -- Nonfinancial."

         The following procedures shall be followed if the Commercial Paper
Rate cannot be determined as described above:

           (i) If the above rate is not published by 9:00 a.m., New York City
time, on the Calculation Date, then the Commercial Paper Rate shall be the
Money Market Yield of the rate on that Interest Determination Date for
commercial paper of the Index Maturity specified on the face hereof as
published in the H.15 Daily Update under the heading "Commercial Paper --
Nonfinancial."

          (ii) If by 3:00 p.m., New York City time, on that Calculation Date
the rate is not yet published in either H.15(519) or the H.15 Daily Update,
then the Calculation Agent shall determine the Commercial Paper Rate to be the
Money Market Yield of the arithmetic mean of the offered rates as of 11:00
a.m., New York City time, on that Interest Determination Date of three leading
dealers of commercial paper in The City of New York selected by the Calculation
Agent (after consultation with the Issuer) for commercial paper of the Index
Maturity specified on the face hereof, placed for an industrial issuer whose
bond rating is "AA," or the equivalent, from a nationally recognized
statistical rating agency.

        (iii) If the dealers selected by the Calculation Agent are not quoting
as set forth above, the Commercial Paper Rate for that Interest Determination
Date shall remain the Commercial Paper Rate for the immediately preceding
Interest Reset Period, or, if there was no Interest Reset Period, the rate of
interest payable shall be the Initial Interest Rate.

                                       10

<PAGE>

         The "Money Market Yield" shall be a yield calculated in accordance
with the following formula:

                 Money Market Yield =      D x 360     x 100
                                        -------------
                                        360 - (D x M)

where "D" refers to the applicable per year rate for commercial paper quoted on
a bank discount basis and expressed as a decimal and "M" refers to the actual
number of days in the interest period for which interest is being calculated.

         Determination of EURIBOR Notes. If the Base Rate specified on the face
hereof is "EURIBOR," for any Interest Determination Date, EURIBOR with respect
to this Note shall be the rate for deposits in euros as sponsored, calculated
and published jointly by the European Banking Federation and ACI - The
Financial Market Association, or any company established by the joint sponsors
for purposes of compiling and publishing those rates, for the Index Maturity
specified on the face hereof as that rate appears on the display on Moneyline
Telerate, Inc., or any successor service, on page 248 or any other page as may
replace page 248 on that service ("Telerate Page 248") as of 11:00 a.m.
(Brussels time).

         The following procedures shall be followed if the rate cannot be
determined as described above:

           (i) If the above rate does not appear, the Calculation Agent shall
request the principal Euro-zone office of each of four major banks in the
Euro-zone interbank market, as selected by the Calculation Agent (after
consultation with the Issuer) to provide the Calculation Agent with its offered
rate for deposits in euros, at approximately 11:00 a.m. (Brussels time) on the
Interest Determination Date, to prime banks in the Euro-zone interbank market
for the Index Maturity specified on the face hereof commencing on the
applicable Interest Reset Date, and in a principal amount not less than the
equivalent of U.S.$1 million in euro that is representative of a single
transaction in euro, in that market at that time. If at least two quotations
are provided, EURIBOR shall be the arithmetic mean of those quotations.

          (ii) If fewer than two quotations are provided, EURIBOR shall be the
arithmetic mean of the rates quoted by four major banks in the Euro-zone, as
selected by the Calculation Agent (after consultation with the Issuer) at
approximately 11:00 a.m. (Brussels time), on the applicable Interest Reset Date
for loans in euro to leading European banks for a period of time equivalent to
the Index Maturity specified on the face hereof commencing on that Interest
Reset Date in a principal amount not less than the equivalent of U.S.$1 million
in euro.

         (iii) If the banks so selected by the Calculation Agent are not
quoting as set forth above, the EURIBOR rate for that Interest Determination
Date shall remain the EURIBOR for the immediately preceding Interest Reset
Period, or, if there was no Interest Reset Period, the rate of interest payable
shall be the Initial Interest Rate.

                                       11

<PAGE>

         "Euro-zone" means the region comprised of member states of the
European Union that adopt the single currency in accordance with the treaty
establishing the European Community, as amended.

         Determination of the Federal Funds Rates. If the Base Rate specified
on the face hereof is the "Federal Funds Rate," for any Interest Determination
Date, the Federal Funds Rate with respect to this Note shall be the rate on
that date for federal funds as published in H.15(519) under the heading
"Federal Funds (Effective)" as displayed on Moneyline Telerate, Inc., or any
successor service, on page 120 or any other page as may replace page 120 on
that service ("Telerate Page 120").

         The following procedures shall be followed if the Federal Funds Rate
cannot be determined as described above:

           (i) If the above rate is not published by 9:00 a.m., New York City
time, on the Calculation Date, the Federal Funds Rate shall be the rate on that
Interest Determination Date as published in the H.15 Daily Update under the
heading "Federal Funds/Effective Rate."

          (ii) If the above rate is not yet published in either H.15(519) or
the H.15 Daily Update by 3:00 p.m., New York City time, on the Calculation
Date, the Calculation Agent shall determine the Federal Funds Rate to be the
arithmetic mean of the rates for the last transaction in overnight federal
funds by each of three leading brokers of federal funds transactions in The
City of New York selected by the Calculation Agent (after consultation with the
Issuer) prior to 9:00 a.m., New York City time, on that Interest Determination
Date.

         (iii) If the brokers selected by the Calculation Agent are not quoting
as set forth in (ii) above, the Federal Funds Rate for that Interest
Determination Date shall remain the Federal Funds Rate for the immediately
preceding Interest Reset Period, or, if there was no Interest Reset Period, the
rate of interest payable shall be the Initial Interest Rate.

         Determination of LIBOR. If the Base Rate specified on the face hereof
is "LIBOR," LIBOR with respect to this Note shall be based on London interbank
offered rate. The Calculation Agent shall determine "LIBOR" for each Interest
Determination Date as follows:

           (i) As of the Interest Determination Date, LIBOR shall be either:
(a) if "LIBOR Reuters" is specified as the Reporting Service on the face
hereof, the arithmetic mean of the offered rates for deposits in the Index
Currency having the Index Maturity designated on the face hereof, commencing on
the second London Banking Day immediately following that Interest Determination
Date, that appear on the Designated LIBOR Page, as defined below, as of 11:00
a.m., London time, on that Interest Determination Date, if at least two offered
rates appear on the Designated LIBOR Page; except that if the specified
Designated LIBOR Page, by its terms provides only for a single rate, that
single rate shall be used; or (b) if "LIBOR Telerate" is specified as the
Reporting Service on the face hereof, the rate for deposits in the Index
Currency having the Index Maturity designated on the face hereof, commencing on
the second London Banking Day immediately following that Interest Determination
Date or, if pounds sterling is the Index Currency, commencing on that Interest

                                       12

<PAGE>

Determination Date, that appears on the Designated LIBOR Page at approximately
11:00 a.m., London time, on that Interest Determination Date.

          (ii) If (a) fewer than two offered rates appear and LIBOR Reuters is
specified on the face hereof, or (b) no rate appears and the face hereof
specifies either (x) LIBOR Telerate or (y) LIBOR Reuters and the Designated
LIBOR Page by its terms provides only for a single rate, then the Calculation
Agent shall request the principal London offices of each of four major
reference banks in the London interbank market, as selected by the Calculation
Agent (after consultation with the Issuer) to provide the Calculation Agent
with its offered quotation for deposits in the Index Currency for the period of
the Index Maturity specified on the face hereof commencing on the second London
Banking Day immediately following the Interest Determination Date or, if pounds
sterling is the Index Currency, commencing on that Interest Determination Date,
to prime banks in the London interbank market at approximately 11:00 a.m.,
London time, on that Interest Determination Date and in a principal amount that
is representative of a single transaction in that Index Currency in that market
at that time.

         (iii) If at least two quotations are provided, LIBOR determined on
that Interest Determination Date shall be the arithmetic mean of those
quotations. If fewer than two quotations are provided, LIBOR shall be
determined for the applicable Interest Reset Date as the arithmetic mean of the
rates quoted at approximately 11:00 a.m., London time, or some other time
specified on the face hereof, in the applicable principal financial center for
the country of the Index Currency on that Interest Reset Date, by three major
banks in that principal financial center selected by the Calculation Agent
(after consultation with the Issuer) for loans in the Index Currency to leading
European banks, having the Index Maturity specified on the face hereof and in a
principal amount that is representative of a single transaction in that Index
Currency in that market at that time.

          (iv) If the banks so selected by the Calculation Agent are not
quoting as set forth above, the LIBOR rate for that Interest Determination Date
shall remain the LIBOR for the immediately preceding Interest Reset Period, or,
if there was no Interest Reset Period, the rate of interest payable shall be
the Initial Interest Rate.

         The "Index Currency" means the currency specified on the face hereof
as the currency for which LIBOR shall be calculated, or, if the euro is
substituted for that currency, the Index Currency shall be the euro. If that
currency is not specified on the face hereof, the Index Currency shall be U.S.
dollars.

         "Designated LIBOR Page" means either: (a) if LIBOR Reuters is
designated as the Reporting Service on the face hereof, the display on the
Reuters Monitor Money Rates Service for the purpose of displaying the London
interbank rates of major banks for the applicable Index Currency or its
designated successor, or (b) if LIBOR Telerate is designated as the Reporting
Service on the face hereof, the display on Moneyline Telerate Inc., or any
successor service, on the page specified on the face hereof, or any other page
as may replace that page on that service, for the purpose of displaying the
London interbank rates of major banks for the applicable Index Currency.

                                       13

<PAGE>

         If neither LIBOR Reuters nor LIBOR Telerate is specified on the face
hereof, LIBOR for the applicable Index Currency shall be determined as if LIBOR
Telerate were specified, and, if the U.S. dollar is the Index Currency, as if
Page 3750, had been specified.

         Determination of Prime Rate. If the Base Rate specified on the face
hereof is "Prime Rate," for any Interest Determination Date, the Prime Rate
with respect to this Note shall be the rate on that date as published in
H.15(519) under the heading "Bank Prime Loan."

         The following procedures shall be followed if the Prime Rate cannot be
determined as described above:

           (i) If the above rate is not published prior to 9:00 a.m., New York
City time, on the Calculation Date, then the Prime Rate shall be the rate on
that Interest Determination Date as published in H.15 Daily Update under the
heading "Bank Prime Loan."

          (ii) If the above rate is not published in either H.15(519) or the
H.15 Daily Update by 3:00 p.m., New York City time, on the Calculation Date,
then the Calculation Agent shall determine the Prime Rate to be the arithmetic
mean of the rates of interest publicly announced by each bank that appears on
the Reuters Screen USPRIME 1 Page, as defined below, as that bank's Prime Rate
or base lending rate as in effect for that Interest Determination Date.

         (iii) If fewer than four rates appear on the Reuters Screen USPRIME 1
Page for that Interest Determination Date, the Calculation Agent shall
determine the Prime Rate to be the arithmetic mean of the Prime Rates quoted on
the basis of the actual number of days in the year divided by 360 as of the
close of business on that Interest Determination Date by at least three major
banks in The City of New York selected by the Calculation Agent (after
consultation with the Issuer).

          (iv) If the banks selected by the Calculation Agent are not quoting
as set forth above, the Prime Rate for that Interest Determination Date shall
remain the Prime Rate for the immediately preceding Interest Reset Period, or,
if there was no Interest Reset Period, the rate of interest payable shall be
the Initial Interest Rate.

         "Reuters Screen USPRIME 1 Page" means the display designated as page
"USPRIME 1" on the Reuters Monitor Money Rates Service, or any successor
service, or any other page as may replace the USPRIME 1 Page on that service
for the purpose of displaying prime rates or base lending rates of major United
States banks.

         Determination of Treasury Rate. If the Base Rate specified on the face
hereof is "Treasury Rate," the Treasury Rate with respect to this Note shall be

         (i) the rate from the Auction held on the applicable Interest
Determination Date (the "Auction") of direct obligations of the United States
("Treasury Bills") having the Index Maturity specified on the face hereof as
that rate appears under the caption "INVESTMENT RATE" on the display on
Moneyline Telerate, Inc., or any successor service, on page 56 or any other
page as may

                                       14

<PAGE>

replace page 56 on that service ("Telerate Page 56") or page 57 or any other
page as may replace page 57 on that service ("Telerate Page 57"); or

          (ii) if the rate described in (i) above is not published by 3:00
p.m., New York City time, on the Calculation Date, the Bond Equivalent Yield of
the rate for the applicable Treasury Bills as published in the H.15 Daily
Update, or other recognized electronic source used for the purpose of
displaying the applicable rate, under the caption "U.S. Government
Securities/Treasury Bills/Auction High;" or

         (iii) if the rate described in (ii) above is not published by 3:00
p.m., New York City time, on the related Calculation Date, the Bond Equivalent
Yield of the Auction rate of the applicable Treasury Bills, announced by the
United States Department of the Treasury; or

          (iv) if the rate described in (iii) above is not announced by the
United States Department of the Treasury, or if the Auction is not held, the
Bond Equivalent Yield of the rate on the applicable Interest Determination Date
of Treasury Bills having the Index Maturity specified on the face hereof
published in H.15(519) under the caption "U.S. Government Securities/Treasury
Bills/Secondary Market;" or

           (v) if the rate described in (iv) above is not so published by 3:00
p.m., New York City time, on the related Calculation Date, the rate on the
applicable Interest Determination Date of the applicable Treasury Bills as
published in H.15 Daily Update, or other recognized electronic source used for
the purpose of displaying the applicable rate, under the caption "U.S.
Government Securities/Treasury Bills/Secondary Market;" or

          (vi) if the rate described in (v) above is not so published by 3:00
p.m., New York City time, on the related Calculation Date, the rate on the
applicable Interest Determination Date calculated by the Calculation Agent as
the Bond Equivalent Yield of the arithmetic mean of the secondary market bid
rates, as of approximately 3:30 p.m., New York City time, on the applicable
Interest Determination Date, of three primary United States government
securities dealers, which may include the agent or its affiliates, selected by
the Calculation Agent, for the issue of Treasury Bills with a remaining
maturity closest to the Index Maturity specified on the face hereof; or

         (vii) if the dealers selected by the Calculation Agent are not quoting
as described in (vi), the Treasury Rate for the immediately preceding Interest
Reset Period, or, if there was no Interest Reset Period, the rate of interest
payable shall be the Initial Interest Rate.

         The "Bond Equivalent Yield" means a yield calculated in accordance
with the following formula and expressed as a percentage:

                 Bond Equivalent Yield =        D x N
                                            -------------     x 100
                                            360 - (D x M)

                                       15

<PAGE>

where "D" refers to the applicable per annum rate for Treasury Bills quoted on
a bank discount basis, "N" refers to 365 or 366, as the case may be, and "M"
refers to the actual number of days in the interest period for which interest
is being calculated.

          Determination of CMT Rate. If the Base Rate specified on the face
hereof is the "CMT Rate," for any Interest Determination Date, the CMT Rate
with respect to this Note shall be the rate displayed on the Designated CMT
Telerate Page (as defined below) under the caption "... Treasury Constant
Maturities ... Federal Reserve Board Release H.15... Mondays Approximately 3:45
p.m.," under the column for the Designated CMT Maturity Index, as defined
below, for:

         (1) the rate on that Interest Determination Date, if the Designated CMT
Telerate Page is 7051; and

         (2) the week or the month, as applicable, ended immediately preceding
the week in which the related Interest Determination Date occurs, if the
Designated CMT Telerate Page is 7052.

         The following procedures shall be followed if the CMT Rate cannot be
determined as described above:

           (i) If the above rate is no longer displayed on the relevant page,
or if not displayed by 3:00 p.m., New York City time, on the related
Calculation Date, then the CMT Rate shall be the Treasury Constant Maturity
rate for the Designated CMT Maturity Index as published in the relevant
H.15(519).

          (ii) If the above rate is no longer published, or if not published by
3:00 p.m., New York City time, on the related Calculation Date, then the CMT
Rate shall be the Treasury Constant Maturity Rate for the Designated CMT
Maturity Index or other United States Treasury rate for the Designated CMT
Maturity Index on the Interest Determination Date as may then be published by
either the Board of Governors of the Federal Reserve System or the United
States Department of the Treasury that the Calculation Agent determines to be
comparable to the rate formerly displayed on the Designated CMT Telerate Page
and published in the relevant H.15(519).

         (iii) If the information set forth above is not provided by 3:00 p.m.,
New York City time, on the related Calculation Date, then the Calculation Agent
shall determine the CMT Rate to be a yield to maturity, based on the arithmetic
mean of the secondary market closing offer side prices as of approximately 3:30
p.m., New York City time, on the Interest Determination Date, reported,
according to their written records, by three leading primary United States
government securities dealers ("Reference Dealers") in The City of New York,
which may include an agent or other affiliates of the Issuer, selected by the
Calculation Agent as described in the following sentence. The Calculation Agent
shall select five reference dealers (after consultation with the Issuer) and
shall eliminate the highest quotation or, in the event of equality, one of the
highest, and the lowest quotation or, in the event of equality, one of the
lowest, for the most recently issued direct noncallable fixed rate obligations
of the United States ("Treasury Notes") with an original maturity of
approximately the Designated CMT Maturity Index and a remaining term to
maturity of not less than that Designated CMT Maturity Index minus one year. If
two Treasury Notes with an original

                                       16

<PAGE>

maturity as described above have remaining terms to maturity equally close to
the Designated CMT Maturity Index, the quotes for the Treasury Note with the
shorter remaining term to maturity shall be used.

          (iv) If the Calculation Agent cannot obtain three Treasury Notes
quotations as described in (iii) above, the Calculation Agent shall determine
the CMT Rate to be a yield to maturity based on the arithmetic mean of the
secondary market offer side prices as of approximately 3:30 p.m., New York City
time, on the Interest Determination Date of three reference dealers in The City
of New York, selected using the same method described in (iii) above, for
Treasury Notes with an original maturity equal to the number of years closest
to but not less than the Designated CMT Maturity Index and a remaining term to
maturity closest to the Designated CMT Maturity Index and in an amount of at
least $100,000,000.

           (v) If three or four (and not five) of the reference dealers are
quoting as described in (iv) above, then the CMT Rate for that Interest
Determination Date shall be based on the arithmetic mean of the offer prices
obtained and neither the highest nor the lowest of those quotes shall be
eliminated.

          (vi) If fewer than three reference dealers selected by the
Calculation Agent are quoting as described in (iv) above, the CMT Rate for that
Interest Determination Date shall be the CMT Rate for the immediately preceding
Interest Reset Period, or, if there was no Interest Reset Period, the rate of
interest payable shall be the Initial Interest Rate.

         "Designated CMT Telerate Page" means the display on Moneyline
Telerate, Inc., or any successor service, on the page designated on the face
hereof or any other page as may replace that page on that service for the
purpose of displaying Treasury Constant Maturities as reported in H.15(519). If
no page is specified on the face hereof, the Designated CMT Telerate Page shall
be 7052, for the most recent week.

         "Designated CMT Maturity Index" means the original period to maturity
of the U.S. Treasury securities, which is either 1, 2, 3, 5, 7, 10, 20 or 30
years, as specified in the applicable pricing supplement for which the CMT Rate
shall be calculated. If no maturity is specified on the face hereof, the
Designated CMT Maturity Index shall be two years.

         Notwithstanding the foregoing, the interest rate hereon shall not be
greater than the Maximum Interest Rate, if any, or less than the Minimum
Interest Rate, if any, specified on the face hereof. The Calculation Agent
shall calculate the interest rate hereon in accordance with the foregoing on or
before each Calculation Date. The interest rate on this Note will in no event
be higher than the maximum rate permitted by New York law, as the same may be
modified by United States Federal law of general application.

         At the request of the holder hereof, the Calculation Agent will
provide to the holder hereof the interest rate hereon then in effect and, if
determined, the interest rate that will become effective as of the next
Interest Reset Date.

                                       17

<PAGE>

         Unless otherwise indicated on the face hereof, interest payments on
this Note shall be the amount of interest accrued from and including the
Interest Accrual Date or from and including the last date to which interest has
been paid or duly provided for to, but excluding the Interest Payment Dates or
the Maturity Date (or any earlier redemption or repayment date), as the case
may be. Accrued interest hereon shall be an amount calculated by multiplying
the face amount hereof by an accrued interest factor. Such accrued interest
factor shall be computed by adding the interest factor calculated for each day
in the period for which interest is being paid. The interest factor for each
such date shall be computed by dividing the interest rate applicable to such
day (i) by 360 if the Base Rate is CD Rate, Commercial Paper Rate, EURIBOR,
Federal Funds Rate, Prime Rate or LIBOR (except if the Index Currency is pounds
sterling); (ii) by 365 if the Base Rate is LIBOR and the Index Currency is
pounds sterling; or (iii) by the actual number of days in the year if the Base
Rate is the Treasury Rate or the CMT Rate. All percentages resulting from any
calculation of the rate of interest on this Note will be rounded, if necessary,
to the nearest one hundred-thousandth of a percentage point (with 0.000005%
being rounded up to 0.00001%) and all dollar amounts used in or resulting from
such calculation on this Note will be rounded to the nearest cent (with
one-half cent rounded upward). All Japanese Yen amounts used in or resulting
from such calculations will be rounded downwards to the next lower whole
Japanese Yen amount. All amounts denominated in any other currency used in or
resulting from such calculations will be rounded to the nearest two decimal
places in such currency (with 0.005 being rounded up to 0.01). The interest
rate in effect on any Interest Reset Date will be the applicable rate as reset
on such date. The interest rate applicable to any other day (other than a day
occurring on or after the Fixed Rate Commencement Date) is the interest rate
from the immediately preceding Interest Reset Date (or, if none, the Initial
Interest Rate). While this Note bears interest at the Fixed Interest Rate,
interest payments on this Note will be computed and paid on the basis of a
360-day year of twelve 30-day months.

         This Note and all the obligations of the Issuer hereunder are direct,
unsecured obligations of the Issuer and rank without preference or priority
among themselves and pari passu with all other existing and future unsecured
and unsubordinated indebtedness of the Issuer, subject to certain statutory
exceptions in the event of liquidation upon insolvency.

         This Note, and any Note or Notes issued upon transfer or exchange
hereof, is issuable only in fully registered form, without coupons, and, if
denominated in U.S. dollars, unless otherwise specified above, is issuable only
in denominations of U.S. $1,000 and any integral multiple of U.S. $1,000 in
excess thereof. If this Note is denominated in a Specified Currency other than
U.S. dollars, then, unless a higher minimum denomination is required by
applicable law, it is issuable only in denominations of the equivalent of U.S.
$1,000 (rounded to an integral multiple of 1,000 units of such Specified
Currency), or any amount in excess thereof which is an integral multiple of
1,000 units of such Specified Currency, as determined by reference to the noon
dollar buying rate in The City of New York for cable transfers of such
Specified Currency published by the Federal Reserve Bank of New York (the
"Market Exchange Rate") on the Business Day immediately preceding the date of
issuance.

         The Trustee has been appointed registrar for the Notes, and the
Trustee will maintain at its office in The City of New York a register for the
registration and transfer of Notes. This Note may be transferred at the
aforesaid office of the Trustee by surrendering this Note for cancellation,

                                       18

<PAGE>

accompanied by a written instrument of transfer in form satisfactory to the
Trustee and duly executed by the registered holder hereof in person or by the
holder's attorney duly authorized in writing, and thereupon the Trustee shall
issue in the name of the transferee or transferees, in exchange herefor, a new
Note or Notes having identical terms and provisions and having a like aggregate
principal amount in authorized denominations, subject to the terms and
conditions set forth herein; provided, however, that the Trustee will not be
required (i) to register the transfer of or exchange any Note that has been
called for redemption in whole or in part, except the unredeemed portion of
Notes being redeemed in part, (ii) to register the transfer of or exchange any
Note if the holder thereof has exercised his right, if any, to require the
Issuer to repurchase such Note in whole or in part, except the portion of such
Note not required to be repurchased, or (iii) to register the transfer of or
exchange Notes to the extent and during the period so provided in the Senior
Indenture with respect to the redemption of Notes. Notes are exchangeable at
said office for other Notes of other authorized denominations of equal
aggregate principal amount having identical terms and provisions. All such
exchanges and transfers of Notes will be free of charge, but the Issuer may
require payment of a sum sufficient to cover any tax or other governmental
charge in connection therewith. All Notes surrendered for exchange shall be
accompanied by a written instrument of transfer in form satisfactory to the
Trustee and executed by the registered holder in person or by the holder's
attorney duly authorized in writing. The date of registration of any Note
delivered upon any exchange or transfer of Notes shall be such that no gain or
loss of interest results from such exchange or transfer.

         In case this Note shall at any time become mutilated, defaced or be
destroyed, lost or stolen and this Note or evidence of the loss, theft or
destruction thereof (together with the indemnity hereinafter referred to and
such other documents or proof as may be required in the premises) shall be
delivered to the Trustee, the Issuer in its discretion may execute a new Note
of like tenor in exchange for this Note, but, if this Note is destroyed, lost
or stolen, only upon receipt of evidence satisfactory to the Trustee and the
Issuer that this Note was destroyed or lost or stolen and, if required, upon
receipt also of indemnity satisfactory to each of them. All expenses and
reasonable charges associated with procuring such indemnity and with the
preparation, authentication and delivery of a new Note shall be borne by the
owner of the Note mutilated, defaced, destroyed, lost or stolen.

         The Senior Indenture provides that (a) if an Event of Default (as
defined in the Senior Indenture) due to the default in payment of principal of
or premium, if any, or interest on, any series of debt securities issued under
the Senior Indenture, including the series of Notes of which this Note forms a
part, or due to the default in the performance or breach of any other covenant
or warranty of the Issuer applicable to the debt securities of such series but
not applicable to all outstanding debt securities issued under the Senior
Indenture, shall have occurred and be continuing, either the Trustee or the
holders of not less than 25% in principal amount of the debt securities of each
affected series (voting as a single class) may then declare the principal of
all debt securities of all such series and interest accrued thereon to be due
and payable immediately and (b) if an Event of Default due to a default in the
performance of any other of the covenants or agreements in the Senior Indenture
applicable to all outstanding debt securities issued thereunder, including this
Note, or due to certain events of bankruptcy or insolvency of the Issuer, shall
have occurred and be continuing, either the Trustee or the holders of not less
than 25% in principal amount of all debt securities issued under the Senior
Indenture then outstanding (treated as one class) may declare the principal of
all such debt

                                       19

<PAGE>

securities and interest accrued thereon to be due and payable immediately, but
upon certain conditions such declarations may be annulled and past defaults may
be waived (except a continuing default in payment of principal or premium, if
any, or interest on such debt securities) by the holders of a majority in
principal amount of the debt securities of all affected series then
outstanding.

         If the face hereof indicates that this Note is subject to "Tax
Redemption and Payment of Additional Amounts," this Note may be redeemed, as a
whole, at the option of the Issuer at any time prior to maturity, upon the
giving of a notice of redemption as described below, at a redemption price
equal to 100% of the principal amount hereof, together with accrued interest to
the date fixed for redemption, if the Issuer determines that, as a result of
any change in or amendment to the laws (or any regulations or rulings
promulgated thereunder) of the United States or of any political subdivision or
taxing authority thereof or therein affecting taxation, or any change in
official position regarding the application or interpretation of such laws,
regulations or rulings, which change or amendment becomes effective on or after
the Initial Offering Date hereof, the Issuer has or will become obligated to
pay Additional Amounts (as defined below) with respect to this Note as
described below. Prior to the giving of any notice of redemption pursuant to
this paragraph, the Issuer shall deliver to the Trustee (i) a certificate
stating that the Issuer is entitled to effect such redemption and setting forth
a statement of facts showing that the conditions precedent to the right of the
Issuer to so redeem have occurred, and (ii) an opinion of independent counsel
satisfactory to the Trustee to such effect based on such statement of facts;
provided that no such notice of redemption shall be given earlier than 60
calendar days prior to the earliest date on which the Issuer would be obligated
to pay such Additional Amounts if a payment in respect of this Note were then
due.

         Notice of redemption will be given not less than 30 nor more than 60
calendar days prior to the date fixed for redemption or within the Redemption
Notice Period specified on face hereof, which date and the applicable
redemption price will be specified in the notice.

         If the face hereof indicates that this Note is subject to "Tax
Redemption and Payment of Additional Amounts," the Issuer will, subject to
certain exceptions and limitations set forth below, pay such additional amounts
(the "Additional Amounts") to the holder of this Note who is a United States
Alien as may be necessary in order that every net payment of the principal of
and interest on this Note and any other amounts payable on this Note, after
withholding for or on account of any present or future tax, assessment or
governmental charge imposed upon or as a result of such payment by the United
States (or any political subdivision or taxing authority thereof or therein),
will not be less than the amount provided for in this Note to be then due and
payable. The Issuer will not, however, be required to make any payment of
Additional Amounts to any such holder for or on account of:

           (a) any such tax, assessment or other governmental charge that would
         not have been so imposed but for (i) the existence of any present or
         former connection between such holder (or between a fiduciary,
         settlor, beneficiary, member or shareholder of such holder, if such
         holder is an estate, a trust, a partnership or a corporation) and the
         United States and its possessions, including, without limitation, such
         holder (or such fiduciary, settlor, beneficiary, member or
         shareholder) being or having been a citizen or resident thereof or

                                       20

<PAGE>

         being or having been engaged in a trade or business or present therein
         or having, or having had, a permanent establishment therein or (ii)
         the presentation by the holder of this Note for payment on a date more
         than 15 calendar days after the date on which such payment became due
         and payable or the date on which payment thereof is duly provided for,
         whichever occurs later;

           (b) any estate, inheritance, gift, sales, transfer or personal
         property tax or any similar tax, assessment or governmental charge;

           (c) any tax, assessment or other governmental charge imposed by
         reason of such holder's past or present status as a personal holding
         company or foreign personal holding company or controlled foreign
         corporation or passive foreign investment company with respect to the
         United States or as a corporation which accumulates earnings to avoid
         United States federal income tax or as a private foundation or other
         tax-exempt organization;

           (d) any tax, assessment or other governmental charge that is payable
         otherwise than by withholding from payments on or in respect of this
         Note;

           (e) any tax, assessment or other governmental charge required to be
         withheld by any Paying Agent from any payment of principal of, or
         interest on, this Note, if such payment can be made without such
         withholding by any other Paying Agent in a city in Western Europe;

           (f) any tax, assessment or other governmental charge that would not
         have been imposed but for the failure to comply with certification,
         information or other reporting requirements concerning the
         nationality, residence or identity of the holder or beneficial owner
         of this Note, if such compliance is required by statute or by
         regulation of the United States or of any political subdivision or
         taxing authority thereof or therein as a precondition to relief or
         exemption from such tax, assessment or other governmental charge;

           (g) any tax, assessment or other governmental charge imposed by
         reason of such holder's past or present status as the actual or
         constructive owner of 10% or more of the total combined voting power
         of all classes of stock entitled to vote of the Issuer or as a direct
         or indirect subsidiary of the Issuer; or

           (h)  any combination of items (a), (b), (c), (d), (e), (f) or (g).

In addition, the Issuer shall not be required to make any payment of Additional
Amounts (i) to any such holder where such withholding or deduction is imposed
on a payment to an individual and is required to be made pursuant to any
European Union Directive on the taxation of savings implementing the agreement
reached in the ECOFIN Council meeting of 13 December 2001 or any law
implementing or complying with, or introduced in order to conform to, such
Directive; or (ii) by or on behalf of a holder who would have been able to
avoid such withholding or deduction by presenting this Note or the relevant
coupon to another Paying Agent in a member state of the European Union. Nor
shall Additional Amounts be paid with respect to any payment on this Note

                                       21

<PAGE>

to a United States Alien who is a fiduciary or partnership or other than the
sole beneficial owner of such payment to the extent such payment would be
required by the laws of the United States (or any political subdivision
thereof) to be included in the income, for tax purposes, of a beneficiary or
settlor with respect to such fiduciary or a member of such partnership or a
beneficial owner who would not have been entitled to the Additional Amounts had
such beneficiary, settlor, member or beneficial owner been the holder of this
Note.

         The Senior Indenture permits the Issuer and the Trustee, with the
consent of the holders of not less than a majority in aggregate principal
amount of the debt securities of all series issued under the Senior Indenture
then outstanding and affected (voting as one class), to execute supplemental
indentures adding any provisions to or changing in any manner the rights of the
holders of each series so affected; provided that the Issuer and the Trustee
may not, without the consent of the holder of each outstanding debt security
affected thereby, (a) extend the final maturity of any such debt security, or
reduce the principal amount thereof, or reduce the rate or extend the time of
payment of interest thereon, or reduce any amount payable on redemption or
repayment thereof, or change the currency of payment thereof, or modify or
amend the provisions for conversion of any currency into any other currency, or
modify or amend the provisions for conversion or exchange of the debt security
for securities of the Issuer or other entities (other than as provided in the
antidilution provisions or other similar adjustment provisions of the debt
securities or otherwise in accordance with the terms thereof), or impair or
affect the rights of any holder to institute suit for the payment thereof
without the consent of the holder of each debt security so affected or (b)
reduce the aforesaid percentage in principal amount of debt securities the
consent of the holders of which is required for any such supplemental
indenture.

         Except as set forth below, if the principal of, premium, if any, or
interest on, this Note is payable in a Specified Currency other than U.S.
dollars and such Specified Currency is not available to the Issuer for making
payments hereon due to the imposition of exchange controls or other
circumstances beyond the control of the Issuer or is no longer used by the
government of the country issuing such currency or for the settlement of
transactions by public institutions within the international banking community,
then the Issuer will be entitled to satisfy its obligations to the holder of
this Note by making such payments in U.S. dollars on the basis of the Market
Exchange Rate on the date of such payment or, if the Market Exchange Rate is
not available on such date, as of the most recent practicable date; provided,
however, that if the euro has been substituted for such Specified Currency, the
Issuer may at its option (or shall, if so required by applicable law) without
the consent of the holder of this Note effect the payment of principal of,
premium, if any, or interest on, any Note denominated in such Specified
Currency in euro in lieu of such Specified Currency in conformity with legally
applicable measures taken pursuant to, or by virtue of, the treaty establishing
the European Community, as amended. Any payment made under such circumstances
in U.S. dollars or euro where the required payment is in an unavailable
Specified Currency will not constitute an Event of Default. If such Market
Exchange Rate is not then available to the Issuer or is not published for a
particular Specified Currency, the Market Exchange Rate will be based on the
highest bid quotation in The City of New York received by the Exchange Rate
Agent at approximately 11:00 a.m., New York City time, on the second Business
Day preceding the date of such payment from three recognized foreign exchange
dealers (the "Exchange Dealers") for the purchase by the quoting Exchange
Dealer of the Specified Currency for U.S. dollars for settlement on the payment
date, in

                                       22

<PAGE>

the aggregate amount of the Specified Currency payable to those holders or
beneficial owners of Notes and at which the applicable Exchange Dealer commits
to execute a contract. One of the Exchange Dealers providing quotations may be
the Exchange Rate Agent unless the Exchange Rate Agent is an affiliate of the
Issuer. If those bid quotations are not available, the Exchange Rate Agent
shall determine the market exchange rate at its sole discretion.

         The "Exchange Rate Agent" shall be Morgan Stanley & Co. Incorporated,
unless otherwise indicated on the face hereof.

         All determinations referred to above made by, or on behalf of, the
Issuer or by, or on behalf of, the Exchange Rate Agent shall be at such
entity's sole discretion and shall, in the absence of manifest error, be
conclusive for all purposes and binding on holders of Notes and coupons.

         So long as this Note shall be outstanding, the Issuer will cause to be
maintained an office or agency for the payment of the principal of and premium,
if any, and interest on this Note as herein provided in the Borough of
Manhattan, The City of New York, and an office or agency in said Borough of
Manhattan for the registration, transfer and exchange as aforesaid of the
Notes. The Issuer may designate other agencies for the payment of said
principal, premium and interest at such place or places (subject to applicable
laws and regulations) as the Issuer may decide. So long as there shall be such
an agency, the Issuer shall keep the Trustee advised of the names and locations
of such agencies, if any are so designated. If any European Union Directive on
the taxation of savings implementing the agreement reached in the ECOFIN
Council meeting of 13 December 2001 or any law implementing or complying with,
or introduced in order to conform to, such Directive is introduced and a Paying
Agent has been designated within the European Union, the Issuer will maintain a
Paying Agent in a member state of the European Union that will not be obligated
to withhold or deduct tax pursuant to any such Directive or law.

         With respect to moneys paid by the Issuer and held by the Trustee or
any Paying Agent for payment of the principal of or interest or premium, if
any, on any Notes that remain unclaimed at the end of two years after such
principal, interest or premium shall have become due and payable (whether at
maturity or upon call for redemption or otherwise), (i) the Trustee or such
Paying Agent shall notify the holders of such Notes that such moneys shall be
repaid to the Issuer and any person claiming such moneys shall thereafter look
only to the Issuer for payment thereof and (ii) such moneys shall be so repaid
to the Issuer. Upon such repayment all liability of the Trustee or such Paying
Agent with respect to such moneys shall thereupon cease, without, however,
limiting in any way any obligation that the Issuer may have to pay the
principal of or interest or premium, if any, on this Note as the same shall
become due.

         No provision of this Note or of the Senior Indenture shall alter or
impair the obligation of the Issuer, which is absolute and unconditional, to
pay the principal of, premium, if any, and interest on this Note at the time,
place, and rate, and in the coin or currency, herein prescribed unless
otherwise agreed between the Issuer and the registered holder of this Note.

         Prior to due presentment of this Note for registration of transfer,
the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat
the holder in whose name this Note is registered as

                                       23

<PAGE>

the owner hereof for all purposes, whether or not this Note be overdue, and
none of the Issuer, the Trustee or any such agent shall be affected by notice
to the contrary.

         No recourse shall be had for the payment of the principal of, premium,
if any, or the interest on this Note, for any claim based hereon, or otherwise
in respect hereof, or based on or in respect of the Senior Indenture or any
indenture supplemental thereto, against any incorporator, shareholder, officer
or director, as such, past, present or future, of the Issuer or of any
successor corporation, either directly or through the Issuer or any successor
corporation, whether by virtue of any constitution, statute or rule of law or
by the enforcement of any assessment or penalty or otherwise, all such
liability being, by the acceptance hereof and as part of the consideration for
the issue hereof, expressly waived and released.

         This Note shall for all purposes be governed by, and construed in
accordance with, the laws of the State of New York.

         As used herein, the term "United States Alien" means any person who,
for United States federal income tax purposes, is a foreign corporation, a
non-resident alien individual, a non-resident alien fiduciary of a foreign
estate or trust, or a foreign partnership one or more of the members of which
is a foreign corporation, a non-resident alien individual or a non-resident
alien fiduciary of a foreign estate or trust.

         All terms used in this Note which are defined in the Senior Indenture
and not otherwise defined herein shall have the meanings assigned to them in
the Senior Indenture.

                                       24

<PAGE>

                                 ABBREVIATIONS

         The following abbreviations, when used in the inscription on the face
of this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

                  TEN COM       -   as tenants in common
                  TEN ENT       -   as tenants by the entireties
                  JT TEN        -   as joint tenants with right of survivorship
                                    and not as tenants in common

         UNIF GIFT MIN ACT -______________________ Custodian____________________
                                  (Minor)                           (Cust)

         Under Uniform Gifts to Minors Act______________________________________
                                                     (State)

         Additional abbreviations may also be used though not in the above
list.

                            ________________________

                                       25

<PAGE>

         FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto

____________________________________________
[PLEASE INSERT SOCIAL SECURITY OR OTHER
     IDENTIFYING NUMBER OF ASSIGNEE]

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
   [PLEASE PRINT OR TYPE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE]

the within Note and all rights thereunder, hereby irrevocably constituting and
appointing such person attorney to transfer such note on the books of the
Issuer, with full power of substitution in the premises.

Dated:___________________________

NOTICE:   The signature to this assignment must correspond with the name as
          written upon the face of the within Note in every particular without
          alteration or enlargement or any change whatsoever.

                                       26

<PAGE>

                           OPTION TO ELECT REPAYMENT

         The undersigned hereby irrevocably requests and instructs the Issuer
to repay the within Note (or portion thereof specified below) pursuant to its
terms at a price equal to the principal amount thereof, together with interest
to the Optional Repayment Date, to the undersigned at

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
        (Please print or typewrite name and address of the undersigned)

         If less than the entire principal amount of the within Note is to be
repaid, specify the portion thereof which the holder elects to have repaid:
________________; and specify the denomination or denominations (which shall not
be less than the minimum authorized denomination) of the Notes to be issued to
the holder for the portion of the within Note not being repaid (in the absence
of any such specification, one such Note will be issued for the portion not
being repaid):________________.

Dated: ________________________________     ____________________________________
                                            NOTICE: The signature on this
                                            Option to Elect Repayment must
                                            correspond with the name as
                                            written upon the face of the
                                            within instrument in every
                                            particular without alteration
                                            or enlargement.

                                       27

<PAGE>

                                                                 [SCHEDULE A](9)

                                  GLOBAL NOTE
                             SCHEDULE OF EXCHANGES

         The initial principal amount of this Note is $__________. [In
accordance with the Unit Agreement dated May 6, 1999 among the Issuer, JPMorgan
Chase Bank (formerly known as The Chase Manhattan Bank), as Unit Agent, as
Collateral Agent and as Trustee under the Indentures referred to therein and
the Holders from time to time of the Units described therein, the following (A)
reductions of the principal amount of this Note by cancellation upon the
application of such amount to the settlement of Purchase Contracts or the
exercise of Universal Warrants or for any other reason or (B) exchanges of
portions of this Note for an interest in a Note that has been separated from a
Unit (a "Separated Note") have been made:](10) [The following (A) reductions of
the principal amount of this Note by cancellation upon the application of such
amount to the settlement of Purchase Contracts or the exercise of Universal
Warrants or for any other reason or (B) exchanges of an interest in a Note that
is part of a Unit (an "Attached Unit Note") for an interest in this Note have
been made:](11)

<TABLE>

                             Principal                          Principal          Increased
                              Amount      Reduced Principal     Amount of      Principal Amount
                             Exchanged   Amount Outstanding   Attached Unit      of this Note
    Date of     Principal       For        Following Such     Note Exchanged      Outstanding     Notation Made by
  Exchange or     Amount     Separated       Exchange or     For Interest in    Following Such     or on Behalf of
 Cancellation    Canceled      Note(10)     Cancellation       this Note(11)     Exchange(11)       Paying Agent
<S>            <C>          <C>          <C>                 <C>                <C>              <C>
______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________

______________  __________  ___________  __________________  ________________  ________________  ____________________
</TABLE>

     --------

         (9)   Schedule A needed only if this Note is issued as part of, or in
               relation to, a Unit.

        (10)   Applies only if this Note remains part of a Unit.

        (11)   Applies only if this Note has been separated from a Unit.

                                       28EXHIBIT 4-p

                           [FORM OF FACE OF SECURITY]

               TEMPORARY GLOBAL FLOATING RATE SENIOR BEARER NOTE

BEARER                                                    BEARER
No. TGFL _____

     ANY UNITED STATES PERSON WHO HOLDS THIS OBLIGATION WILL BE SUBJECT TO
LIMITATIONS UNDER THE UNITED STATES INCOME TAX LAWS, INCLUDING THE LIMITATIONS
PROVIDED IN SECTIONS 165(j) AND 1287(a) OF THE INTERNAL REVENUE CODE.

     UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR AN INTEREST IN A
PERMANENT GLOBAL BEARER NOTE, THIS GLOBAL NOTE MAY NOT BE TRANSFERRED EXCEPT AS
A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE
DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH
SUCCESSOR DEPOSITARY.

     THIS NOTE HAS NOT BEEN, AND WILL NOT BE, REGISTERED UNDER THE SECURITIES
AND EXCHANGE LAW OF JAPAN. THIS NOTE MAY NOT BE OFFERED OR SOLD, DIRECTLY OR
INDIRECTLY, IN JAPAN OR TO, OR FOR THE BENEFIT OF, ANY RESIDENT OF JAPAN (WHICH
TERM AS USED HEREIN MEANS ANY PERSON RESIDENT IN JAPAN INCLUDING ANY
CORPORATION OR OTHER ENTITY ORGANIZED UNDER THE LAWS OF JAPAN) OR TO OTHERS FOR
THE RE-OFFERING OR RE-SALE, DIRECTLY OR INDIRECTLY, IN JAPAN OR TO A RESIDENT
OF JAPAN EXCEPT PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF,
AND OTHERWISE IN COMPLIANCE WITH, THE SECURITIES AND EXCHANGE LAW OF JAPAN AND
OTHER RELEVANT LAWS AND REGULATIONS OF JAPAN.(1)

--------
     (1) If this Note is offered in Japan or denominated in Japanese Yen,
appropriate legends need to be added.

<PAGE>

                        MORGAN STANLEY DEAN WITTER & CO.
                  SENIOR GLOBAL MEDIUM-TERM NOTE, SERIES [D/E]
                                (Floating Rate)

<TABLE>
-------------------------------------------------------------------------------------
<S>                         <C>                           <C>
ORIGINAL ISSUE DATE:        INTEREST ACCRUAL DATE:        INTEREST PAYMENT DATE(S):
-------------------------------------------------------------------------------------
MATURITY DATE:              INITIAL INTEREST RATE:        INTEREST PAYMENT PERIOD:
-------------------------------------------------------------------------------------
BASE RATE:                  INITIAL INTEREST RESET        INTEREST RESET PERIOD:
                               DATE:
-------------------------------------------------------------------------------------
INDEX MATURITY:             MAXIMUM INTEREST RATE:        INTEREST RESET DATE(S):
-------------------------------------------------------------------------------------
SPREAD (PLUS OR MINUS):     MINIMUM INTEREST RATE:        CALCULATION AGENT:
-------------------------------------------------------------------------------------
SPREAD MULTIPLIER:          INITIAL REDEMPTION DATE:      SPECIFIED CURRENCY:
-------------------------------------------------------------------------------------
EUROCLEAR NO:               INITIAL REDEMPTION            INDEX CURRENCY:
                               PERCENTAGE:
-------------------------------------------------------------------------------------
CLEARSTREAM NO:             ANNUAL REDEMPTION             DESIGNATED CMT TELERATE
                               PERCENTAGE REDUCTION:         PAGE:
-------------------------------------------------------------------------------------
COMMON CODE:                OPTIONAL REPAYMENT            DESIGNATED CMT MATURITY
                               DATE(S):                      INDEX:
-------------------------------------------------------------------------------------
ISIN:                       REDEMPTION NOTICE PERIOD:(2)  MINIMUM DENOMINATIONS:
REPORTING SERVICE:                                        EXCHANGE FOR REGISTERED
                                                          NOTES: [NO](3)
-------------------------------------------------------------------------------------
OTHER PROVISIONS:
-------------------------------------------------------------------------------------
</TABLE>

     Morgan Stanley Dean Witter & Co., a Delaware corporation (together with
its successors and assigns, the "Issuer"), for value received, hereby promises
to pay to bearer, upon surrender hereof, the principal amount specified in
Schedule A hereto, on the Maturity Date specified above (except to the extent
previously redeemed or repaid) and to pay interest thereon, from and including
the Interest Accrual Date specified above at a rate per annum equal to the
Initial Interest Rate specified above until but excluding the Initial Interest
Reset Date specified above, and on and after at a rate per annum determined in
accordance with the provisions specified in the Permanent Global Bearer Note
(as defined below) until but excluding the date such principal amount is paid
or duly made available for payment (except as provided below). The Issuer will
pay interest in arrears monthly, quarterly, semiannually or annually as
specified above as the Interest Payment Period on each Interest Payment Date
(as specified above), commencing with the first Interest Payment Date next
succeeding the Interest Accrual Date specified above, and at maturity (or on
any redemption or

--------

     (2) Applicable if other than 30-60 calendar days. Consult with Euroclear
or Clearstream if a shorter redemption is requested. A minimum of 10 calendar
days may be possible.

     (3) Unless explicitly stated otherwise in term sheet, MSDW practice has
been to exclude this option.

                                      -2-

<PAGE>

repayment date); provided, however, that if the Interest Accrual Date occurs
fifteen calendar days or less prior to the first Interest Payment Date
occurring after the Interest Accrual Date, interest payments will commence on
the second Interest Payment Date succeeding the Interest Accrual Date; and
provided, further, that if an Interest Payment Date (other than the Maturity
Date (as specified above) or any redemption or repayment date) would fall on a
day that is not a Business Day, as defined below, such Interest Payment Date
shall be the following day that is a Business Day, except that if the Base Rate
specified above is LIBOR or EURIBOR and such next Business Day falls in the
next calendar month, such Interest Payment Date shall be the immediately
preceding day that is a Business Day; and provided, further, that if the
Maturity Date or redemption or repayment date would fall on a day that is not a
Business Day, the payment of principal, premium, if any, and interest will be
made on the next succeeding Business Day and no interest shall accrue for the
period from and after such Maturity Date or redemption or repayment date.

     Interest on this Note will accrue from and including the most recent
Interest Payment Date to which interest has been paid or duly provided for, or,
if no interest has been paid or duly provided for, from and including the
Interest Accrual Date, until but excluding the date the principal amount hereof
has been paid or duly made available for payment. Upon any payment of interest
on this Note, the Principal Paying Agent (as defined below) shall cause
Schedule A of this Note to be endorsed to reflect such payment. No payment on
this Note will be made at any office or agency of the Issuer in the United
States or by check mailed to an address in the United States (as defined below)
or by wire transfer to an account maintained by the holder of this Note with a
bank in the United States except as may be permitted under United States
federal tax laws and regulations then in effect without adverse tax
consequences to the Issuer. Notwithstanding the foregoing, in the event that
payment in U.S. dollars of the full amount payable on this Note at the offices
of all Paying Agents (as defined below) would be illegal or effectively
precluded as a result of exchange controls or similar restrictions, payment on
this Note will be made by a paying agency in the United States, if such paying
agency, under applicable law and regulations, would be able to make such
payment. Notwithstanding any other provision of this Note, no payment of
principal or interest shall be made on any portion of this Note unless there
shall have been delivered to the Principal Paying Agent a certificate
substantially in the form of Exhibit A hereto with respect to the portion of
this Note with respect to which such principal or interest is to be paid. Such
certificate shall have been delivered to the Principal Paying Agent by
Euroclear Bank S.A./N.V., as operator of the Euroclear System ("Euroclear"),
Clearstream Banking, societe anonyme ("Clearstream, Luxembourg"), and/or any
other relevant clearing system (including Euroclear France), as the case may
be, and shall be based on a certificate substantially in the form of Exhibit B
hereto provided to Euroclear, Clearstream, Luxembourg and/or any other relevant
clearing system, as the case may be, by those of its account holders who are to
receive such payment of principal or interest.

     This Note is issued in temporary global bearer form and represents all or
a portion of a duly authorized issue of Senior Global Medium-Term Notes, Series
[D/E] (the "Notes") of the Issuer. The Notes are issuable under an Amended and
Restated Senior Indenture, dated as of May 1, 1999, between the Issuer and
JPMorgan Chase Bank (formerly known as The Chase Manhattan Bank), as Trustee
(the "Trustee", which term includes any successor trustee under the Senior
Indenture) (as

                                      -3-

<PAGE>

may be amended or supplemented from time to time, the "Senior Indenture") to
which Senior Indenture and all indentures supplemental thereto reference is
hereby made for a statement of the respective rights, limitations of rights,
duties and immunities of the Issuer, the Trustee and holders of the Notes and
the terms upon which the Notes are, and are to be, authenticated and delivered.
The Issuer has appointed JPMorgan Chase Bank, London Branch, as its principal
paying agent for the Notes (the "Principal Paying Agent," which term includes
any additional or successor Principal Paying Agent appointed by the Issuer).

     Except as otherwise provided herein, this Note is governed by the terms
and conditions of the Permanent Global Floating Rate Senior Bearer Note (the
"Permanent Global Bearer Note") to be issued in exchange for this Note, which
terms and conditions are hereby incorporated by reference herein mutatis
mutandis and shall be binding on the Issuer and the holder hereof as if fully
set forth herein. The form of the Permanent Global Bearer Note is attached
hereto.

     This Note is exchangeable in whole or from time to time in part on or
after the Exchange Date (as defined below) for an interest (equal to the
principal amount of the portion of this Note being exchanged) in a single
Permanent Global Bearer Note upon the request of Euroclear, Clearstream,
Luxembourg and/or any other relevant clearing system, acting on behalf of the
owner of a beneficial interest in this Note, to the Principal Paying Agent upon
delivery to the Principal Paying Agent of a certificate substantially in the
form of Exhibit A hereto with respect to the portion of this Note to be
exchanged. Such certificate shall have been delivered to the Principal Paying
Agent by Euroclear, Clearstream, Luxembourg and/or any other relevant clearing
system, as the case may be, and shall be based on a certificate substantially
in the form of Exhibit B hereto provided to Euroclear, Clearstream, Luxembourg
and/or any other relevant clearing system, as the case may be, by those of its
account holders having an interest in the portion hereof to be exchanged.
Notwithstanding the foregoing, if this Note is subject to a tax redemption as
described on the reverse of the Permanent Global Bearer Note attached hereto,
interests in this Note may be exchanged for interests in a permanent Global
Bearer Note on and after such redemption date as if such redemption date had
been the Exchange Date, subject to receipt of the certificates described in the
preceding sentence. Upon exchange of any portion of this Note for an interest
in a Permanent Global Bearer Note, the Principal Paying Agent shall cause
Schedule A of this Note to be endorsed to reflect the reduction of its
principal amount by an amount equal to the aggregate principal amount being so
exchanged. Except as otherwise provided herein, until exchanged for a Permanent
Global Bearer Note, this Note shall in all respects be entitled to the same
benefits under the Senior Indenture as a duly authenticated and delivered
Permanent Global Bearer Note.

     As used herein:

          (a) the term "Business Day" means any day, other than a Saturday or
     Sunday, (i) that is neither a legal holiday nor a day on which banking
     institutions are authorized or required by law or regulation to close (x)
     in The City of New York or in London or (y) if this Note is denominated in
     a Specified Currency other than U.S. dollars, euro or Australian dollars,
     in the principal financial center of the country of the Specified
     Currency, or (z) if this

                                      -4-

<PAGE>

     Note is denominated in Australian dollars, in Sydney and (ii) if this Note
     is denominated in euro, that is also a day on which the Trans-European
     Automated Real-time Gross Settlement Express Transfer System ("TARGET") is
     operating (a "TARGET Settlement Day").

          (b) the term "Exchange Date" means the date that is 40 calendar days
     after the date on which the Issuer receives the proceeds of the sale of
     this Note (the "Closing Date"), provided that if an interest represented
     by this Note is held by Morgan Stanley & Co. International Limited, or any
     other manager participating in the distribution of the tranche of Notes of
     which this Note forms a part, as part of an unsold allotment or
     subscription more than 40 calendar days after the Closing Date for this
     Note, the Exchange Date with respect to such interest shall be the day
     after the date such interest is sold by Morgan Stanley & Co. International
     Limited or such other manager, all as determined and notified to the
     Trustee by Morgan Stanley & Co. International Limited, or if Morgan
     Stanley & Co. International Limited did not participate in the
     distribution of such tranche, by the Issuer.

          (c) the term "United States" means the United States of America
     (including the States and the District of Columbia); and its "possessions"
     include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake
     Island and the Northern Mariana Islands.

All other terms used in this Note which are defined in the Senior Indenture and
not otherwise defined herein shall have the meanings assigned to them in the
Senior Indenture.

     Unless the certificate of authentication hereon has been executed by the
Trustee by manual signature, this Note shall not be entitled to any benefit
under the Senior Indenture, as defined on the reverse hereof, or be valid or
obligatory for any purpose.

                                      -5-

<PAGE>

     IN WITNESS WHEREOF, the Issuer has caused this Note to be duly executed.

DATED:                                          MORGAN STANLEY DEAN WITTER & CO.

                                                By:
                                                    ----------------------------
                                                    Name:
                                                    Title:

TRUSTEE'S CERTIFICATE
  OF AUTHENTICATION

This is one of the Notes referred
  to in the within-mentioned
  Senior Indenture.

JPMORGAN CHASE BANK,
  as Trustee

By:
    ------------------------------
    Authorized Officer

                                      -6-

<PAGE>

                                                                      SCHEDULE A

                             SCHEDULE OF EXCHANGES

     The Initial Principal Amount of this Note is ______________. The following
payments of interest and exchanges of a part of this Note for an interest in a
single Permanent Global Bearer Note have been made:

<TABLE>
                                                   Principal Amount      Remaining Principal
                                                    Exchanged for         Amount Outstanding       Notation Made
   Date of Exchange                                   Permanent               Following          by or on Behalf of
  or Interest Payment     Payment of Interest     Global Bearer Note        Such Exchange      Principal Paying Agent
---------------------------------------------------------------------------------------------------------------------
<S>                       <C>                     <C>                    <C>                   <C>
---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

</TABLE>

<PAGE>

                                                                       EXHIBIT A

                      [FORM OF CERTIFICATE TO BE GIVEN BY
                       EUROCLEAR, CLEARSTREAM, LUXEMBOURG
                   AND/OR ANY OTHER RELEVANT CLEARING SYSTEM]

                                  CERTIFICATE

                            -----------------------

                        Morgan Stanley Dean Witter & Co.
                     Global Medium-Term Notes, Series [D/E]

                  Represented by Temporary Global Note No. __

     This is to certify that, based solely on certifications we have received
in writing, by tested telex or by electronic transmission from member
organizations appearing in our records as persons being entitled to a portion
of the principal amount set forth below (our "Member Organizations")
substantially to the effect set forth in Appendix 2 to Exhibit B to the Euro
Distribution Agreement relating to such Notes, as of the date hereof,
__________ principal amount of the above-captioned Securities (i) is owned by
persons that are not citizens or residents of the United States, domestic
partnerships, domestic corporations, an estate the income of which is subject
to United States Federal income taxation regardless of its source or a trust if
both (a) a court within the United States is able to exercise primary
supervision over the administration of the trust and (b) one or more United
States persons have the authority to control all substantial decisions of the
trust ("United States persons"), (ii) is owned by United States persons that
are (a) foreign branches of United States financial institutions (as defined in
the applicable U.S. Treasury Regulations) ("financial institutions") purchasing
for their own account or for resale, or (b) United States persons who acquired
the Securities through foreign branches of United States financial institutions
and who hold the Securities through such United States financial institutions
on the date hereof (and in either case (a) or (b), each such United States
financial institution has agreed, on its own behalf or through its agent, that
we may advise the Issuer or the Issuer's agent that it will comply with the
requirements of Section 165(j)(3)(A), (B) or (C) of the U.S. Internal Revenue
Code of 1986, as amended, and the regulations thereunder), or (iii) is owned by
United States or foreign financial institutions for purposes of resale during
the restricted period (as defined in the applicable U.S. Treasury Regulations),
and such United States or foreign financial institutions described in clause
(iii) above (whether or not also described in clause (i) or (ii)) have
certified that they have not acquired the Securities for purposes of resale
directly or indirectly to a United States person or to a person within the
United States or its possessions. Any such certification by electronic
transmission satisfies the requirements set forth in United States Treasury
Regulations Section 1.163-5(c)(2)(i)(D)(3)(ii). We will retain all
certifications from our Member Organizations for the period specified in United
States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(3)(i).

<PAGE>

     As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

     We further certify (i) that we are not making available herewith for
exchange (or, if relevant, seeking to collect principal or interest with
respect to) any portion of the temporary global Security representing the
above-captioned Securities excepted in the above-referenced certificates of
Member Organizations and (ii) that as of the date hereof we have not received
any notification from any of our Member Organizations to the effect that the
statements made by such Member Organizations with respect to any portion of the
part submitted herewith (or, if relevant, with respect to which principal or
interest is being requested) are no longer true and cannot be relied upon as of
the date hereof.

     We understand that this certification is required in connection with
certain tax laws and, if applicable, certain securities laws of the United
States. In connection therewith, if administrative or legal proceedings are
commenced or threatened in connection with which this certification is or would
be relevant, we irrevocably authorize you to produce this certification to any
interested party in such proceedings.

                                      A-2

<PAGE>

Dated:  _______________, 20__

[To be dated no earlier than
[insert date of Interest Payment Date prior to Exchange Date]
[insert date of Redemption Date prior to Exchange Date]
[insert Exchange Date]]

                                          [EUROCLEAR BANK S.A./N.V., as
                                          Operator of the Euroclear System]

                                          [CLEARSTREAM BANKING, SOCIETE ANONYME]

                                          [OTHER]

                                          By:
                                              ----------------------------------
                                              Name:
                                              Title:

                                      A-3

<PAGE>

                                                                       EXHIBIT B

                 [FORM OF CERTIFICATE TO BE GIVEN BY AN ACCOUNT
                  HOLDER OF EUROCLEAR, CLEARSTREAM, LUXEMBOURG
                   AND/OR ANY OTHER RELEVANT CLEARING SYSTEM]

                                  CERTIFICATE

                            -----------------------

                        Morgan Stanley Dean Witter & Co.
                     Global Medium-Term Notes, Series [D/E]

                  Represented by Temporary Global Note No. __

     This is to certify that as of the date hereof, and except as set forth
below, the above-captioned Securities held by you for our account (i) are owned
by person(s) that are not citizens or residents of the United States, domestic
partnerships, domestic corporations, an estate the income of which is subject
to United States Federal income taxation regardless of its source, or a trust
if both (a) a court within the United States is able to exercise primary
supervision over the administration of the trust and (b) one or more United
States persons have the authority to control all substantial decisions of the
trust ("United States person(s)"), (ii) are owned by United States person(s)
that are (a) foreign branches of United States financial institutions (as
defined in the applicable U.S. Treasury Regulations) ("financial institutions")
purchasing for their own account or for resale, or (b) United States person(s)
who acquired the Securities through foreign branches of United States financial
institutions and who hold the Securities through such United States financial
institutions on the date hereof (and in either case (a) or (b), each such
United States financial institution hereby agrees, on its own behalf or through
its agent, that you may advise the Issuer or the Issuer's agent that it will
comply with the requirements of Section 165(j)(3)(A), (B) or (C) of the U.S.
Internal Revenue Code of 1986, as amended, and the regulations thereunder), or
(iii) are owned by United States or foreign financial institution(s) for
purposes of resale during the restricted period (as defined in the applicable
U.S. Treasury Regulations), and in addition if the owner of the Securities is a
United States or foreign financial institution described in clause (iii) above
(whether or not also described in clause (i) or (ii)) such financial
institution has not acquired the Securities for purposes of resale directly or
indirectly to a United States person or to a person within the United States or
its possessions.

     As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

     We undertake to advise you promptly by tested telex on or prior to the
date on which you intend to submit your certification relating to the
Securities held by you for our account in accordance

<PAGE>

with your Operating Procedures if any applicable statement herein is not
correct on such date, and in the absence of any such notification it may be
assumed that this certification applies as of such date.

     This certification excepts and does not relate to [U.S.$]___________ of
such interest in the above-captioned Securities in respect of which we are not
able to certify and as to which we understand exchange for and delivery of
definitive Securities (or, if relevant, exercise of any rights or collection of
any principal or interest) cannot be made until we do so certify.

     We understand that this certification is required in connection with
certain tax laws and, if applicable, certain securities laws of the United
States. In connection therewith, if administrative or legal proceedings are
commenced or threatened in connection with which this certification is or would
be relevant, we irrevocably authorize you to produce this certification to any
interested party in such proceedings.

                                      B-2

<PAGE>

Dated:  _______________, 20__

[To be dated no earlier than the 10th day before
[insert date of Interest Payment Date prior to Exchange Date]
[insert date of Redemption Date prior to Exchange Date]
[insert Exchange Date]]

                                                [NAME OF ACCOUNT HOLDER]

                                                By:
                                                    ----------------------------
                                                    (Authorized Signatory)
                                                    Name:
                                                    Title:

                                      B-3

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