Document:

Exhibit 4.1

                           LEXMARK INTERNATIONAL, INC.

                                    as Issuer

                                       and

                        LEXMARK INTERNATIONAL GROUP, INC.

                                  as Guarantor

                                       to

                              THE BANK OF NEW YORK

                                   as Trustee

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

                          FIRST SUPPLEMENTAL INDENTURE

                             Dated as of June 22, 2000

                                       to

                                    Indenture

                            Dated as of May 11, 1998

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

                                  $150,000,000

                          6 3/4% Senior Notes due 2008

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         FIRST SUPPLEMENTAL INDENTURE dated as of June 22, 2000,  among LEXMARK
INTERNATIONAL,   INC.,   a  Delaware   corporation   (the   "Issuer"),   LEXMARK
INTERNATIONAL GROUP, INC., a Delaware corporation (the "Guarantor") and THE BANK
OF NEW YORK, a New York banking corporation, as Trustee (the "Trustee").

         WHEREAS,   the  Issuer  and  Guarantor  have  heretofore  executed  and
delivered  to  the  Trustee  an  Indenture   dated  as  of  May  11,  1998  (the
"Indenture"),  providing for the issuance of  $150,000,000  aggregate  principal
amount of 6 3/4% Senior Notes due 2008 (the "Notes");

         WHEREAS,  the Issuer and Guarantor have entered into that certain
Agreement and Plan of Merger  dated as of February  29, 2000 (the  "Merger
Agreement"),  providing for the merger of the Guarantor with and into the Issuer
(the "Merger");

         WHEREAS,  the  Issuer,  Guarantor  and  Trustee  desire  by this  First
Supplemental  Indenture  pursuant to and as  contemplated  by Section 801 of the
Indenture,  that the Issuer expressly  assume all of the obligations  related to
the due and  punctual  payment of the  principal  of (and  premium,  if any) and
interest on the Notes and the performance or observance of every covenant of the
Indenture to be performed or observed by the Guarantor as Guarantor  pursuant to
the terms of the Indenture;

         WHEREAS,   the  execution  and  delivery  of  this  First  Supplemental
Indenture has been  authorized by  resolutions of the Boards of Directors of the
Issuer and Guarantor; and

         WHEREAS,  all conditions and requirements  necessary to make this First
Supplemental  Indenture a valid, binding legal instrument in accordance with its
terms have been  performed and fulfilled by the parties hereto and the execution
and delivery  thereof have been in all respects  duly  authorized by the parties
hereto.

         NOW,  THEREFORE,  in  consideration  of the above premises,  each party
agrees,  for the benefit of the others and for the equal and ratable  benefit of
the holders of the Notes, as follows:

                                    ARTICLE I

                     ASSUMPTION OF OBLIGATIONS AS GUARANTOR

         Section   1.01   Assumption.    The   Issuer   hereby   expressly   and
unconditionally  assumes all obligations related to the due and punctual payment
of the  principal  of (and  premium,  if any) and  interest on the Notes and the
performance or observance of each and every covenant,  agreement and undertaking
of the  Guarantor  in the  Indenture  as of the  effective  time of  this  First

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Supplemental  Indenture,  and also hereby expressly and unconditionally  assumes
each and every covenant, agreement and undertaking of the Guarantor in each Note
outstanding on the date of this First Supplemental Indenture.

                                   ARTICLE II

                            MISCELLANEOUS PROVISIONS

         Section 2.01 Defined Terms. For all purposes of this First Supplemental
                      -------------
Indenture, except as otherwise defined or unless the context otherwise requires,
terms used in capitalized form in this First Supplemental  Indenture and defined
in the Indenture have the meanings specified in the Indenture.

         Section 2.02 Indenture.  Except  as  amended  hereby,  the
                      ---------
Indenture  and the  Notes are in all  respects  ratified  and confirmed and all
the terms shall remain in full force and effect.

         Section 2.03  Governing Law. THIS FIRST  SUPPLEMENTAL  INDENTURE SHALL
                       -------------
BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW
YORK.

         Section 2.04  Successors.  All  agreements  of the Issuer in this First
                       ----------
Supplemental  Indenture and the Notes shall bind its successors.  All agreements
of the Trustee in this First Supplemental Indenture shall bind its successors.

         Section 2.05  Duplicate  Originals.  All parties may sign any number of
                       --------------------
copies of this  First  Supplemental  Indenture.  Each  signed  copy  shall be an
original, but all of them together shall represent the same agreement.

         Section 2.06 Severability. In case any one or more of the provisions in
                      ------------
this First Supplemental Indenture or in the Notes shall be held invalid, illegal
or  unenforceable,  in any respect for any reason,  the  validity,  legality and
enforceability of any such provision in every other respect and of the remaining
provisions  shall  not in any way be  affected  or  impaired  thereby,  it being
intended that all of the  provisions  hereof shall be enforceable to the fullest
extent permitted by law.

         Section 2.07 Trustee  Disclaimer.  The Trustee accepts the amendment of
                      -------------------
the  Indenture  effected  by this  First  Supplemental  Indenture  and agrees to
execute the trust created by the Indenture as hereby  amended,  but on the terms
and conditions  set forth in the  Indenture,  including the terms and provisions
defining and limiting the liabilities and responsibilities of the Trustee, which
terms and provisions  shall in like manner define and limit its  liabilities and
responsibilities  in the  performance  of the trust  created by the Indenture as
hereby  amended,  and without  limiting the  generality  of the  foregoing,  the
Trustee shall not be responsible in any manner whatsoever for or with respect to
any of the recitals or statements  contained  herein,  all of which  recitals or
statements are made solely by the Issuer and  Guarantor,  or for or with respect
to (i) the validity or sufficiency of this First  Supplemental  Indenture or any
of the terms or provisions hereof, (ii) the proper  authorization  hereof by the

<PAGE>

Issuer and Guarantor by corporate  action or otherwise,  (iii) the due execution
hereof by the Issuer and Guarantor or (iv) the consequences  (direct or indirect
and whether deliberate or inadvertent) of any amendment herein provided for, and
the Trustee makes no representation with respect to any such matters.

         Section 2.08 Effectiveness.  This First Supplemental  Indenture shall
                      -------------
become effective July 1, 2000, 12:01 a.m. E.D.S.T., conditioned  only upon its
execution,  the prior  receipt  by the  Trustee  of an  Officer's  Certificate
from each of the Issuer and Guarantor, and an opinion of counsel to the Issuer,
each of which shall be dated no earlier than the date hereof.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

<PAGE>

         IN  WITNESS  WHEREOF,   the  parties  hereto  have  caused  this  First
Supplemental Indenture to be duly executed as of the day and year written above.

                                             LEXMARK INTERNATIONAL, INC.
                                             as Issuer

                                             By:   /s/ Gary E. Morin
                                                  -----------------------------
                                                   Executive Vice
                                                     President and Chief
                                                     Financial Officer

                                             LEXMARK INTERNATIONAL GROUP, INC.
                                             as Guarantor

                                             By:   /s/ Gary E. Morin
                                                  -----------------------------
                                                   Executive Vice
                                                     President and Chief
                                                     Financial Officer

                                             THE BANK OF NEW YORK
                                             as Trustee

                                                  /s/ Robert A. Massimillo
                                                  -----------------------------
                                                  By:    Robert A. Massimillo
                                                  Title: Assistant Vice
                                                            PresidentExhibit 4.2

NUMBER   Class A Common Stock  CUSIP 529771 10 7                       SHARES
N        par value $.01        see reverse for certain definitions
  ----                                                                 ------

                           Lexmark International, Inc.
              Incorporated under the laws of the State of Delaware

THIS CERTIFIES THAT

IS THE OWNER OF

         Fully paid and non-assessable shares of  the  Class  A Common Stock of
                           Lexmark International, Inc.

transferable  on the books of the  Corporation by the holder hereof in person or
by  duly  authorized  Attorney  upon  surrender  of  this  Certificate  properly
endorsed.  This Certificate is not valid unless  countersigned and registered by
the Transfer Agent and Registrar.  Witness the seal of the  Corporation  and the
signatures of its duly authorized officers.

[SEAL]   Dated:            Countersigned and Registered:
                           CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
                           Transfer Agent and Registrar

                           By

                           Authorized Signature

Secretary                  Chairman and Chief Executive Officer

<PAGE>

                                 [Reverse Side]

                           Lexmark International, Inc.

         This Corporation will furnish without charge to each stockholder who so
requests,  a statement of the powers,  designations,  preferences  and relative,
participating,  option or other special  rights of each class of stock or series
thereof and the qualifications,  limitations or restrictions of such preferences
and/or rights.

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

TEN COM - as tenants in common   UNIF GIFT MIN ACT --         Custodian
                                                       ----              -----
                                                      (Cust)            (Minor)
TEN ENT - as tenants by the entireties        under Uniform Gifts to Minors Act

JT TEN - as joint tenants with right
                                               ---------------------------
         of survivorship and not as                       (State)
          tenants in common

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

For value received,                     hereby sell, assign and transfer unto
                    --------------------

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

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Please print or typewrite name and address including postal zip code of assignee

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                                                                          shares
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of capital stock represented by the within Certificate and do hereby irrevocably
constitute and appoint

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Attorney to transfer the said stock on the books of the within-named Corporation
with full power of substitution in the premises.

<PAGE>

Dated:                                           ---------------------------
         ------------------                                Signature

In presence of:                                  ----------------------------
                                                           Signature
----------------------------
                                           NOTICE: The signature(s)to this
                                           assignment must correspond with the
                                           name as written upon the face of the
                                           Certificate, in every  particular,
                                           without alteration or enlargement, or
                                           any change whatever.

         This  certificate  also  evidences  and entitles  the holder  hereof to
certain Rights as set forth in an Amended and Restated Rights Agreement  between
Lexmark International,  Inc., as successor to Lexmark International Group, Inc.,
and ChaseMellon Shareholder Services, L.L.C. (the "Rights Agreement"), the terms
of which are hereby  incorporated  herein by reference and a copy of which is on
file at the principal  executive  offices of Lexmark  International,  Inc. Under
certain circumstances, as set forth in the Rights Agreement, such Rights will be
evidenced  by  separate  certificates  and will no longer be  evidenced  by this
certificate.  Lexmark  International,  Inc.  will  mail  to the  holder  of this
certificate  a copy of the Rights  Agreement as in effect on the date of mailing
without  charge within five  Business  Days after  receipt of a written  request
therefor. Under certain circumstances set forth in the Rights Agreement,  Rights
beneficially owned by an Acquiring Person may become null and void.

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