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                                                                Exhibit 10(a)


                Security Banc Corporation 1987 Stock Option Plan


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                            SECURITY BANC CORPORATION

                             1987 STOCK OPTION PLAN

                  1. Name and Purpose. This Plan shall be known as the Security
Banc Corporation 1987 Stock Option Plan (the "Plan"). The purpose of the Plan is
to advance the interests of Security Banc Corporation (the "Corporation") by
providing material incentive for the continued services of key employees and by
attracting able personnel to employment with the Corporation and its
Subsidiaries. The term "Subsidiary" as used herein means a subsidiary
corporation of the Corporation as the term is defined in Section 425(f) of the
Internal Revenue Code of 1986 (the "Code").

                  2. Administration. The Plan shall be administered by the Board
of Directors of the Corporation (the "Board"). The Board may establish, subject
to the provisions of the Plan, such rules and regulations as it deems necessary
for the proper administration of the Plan, and make such determinations and take
such action in connection therewith or in relation to the Plan as it deems
necessary or advisable, consistent with the Plan.

                  3. Eligibility. Regular full-time employees of the Corporation
and its Subsidiaries who are key employees, including officers, whether or not
directors of the Corporation, shall be eligible to participate in the Plan. Such
employees are herein referred to as "Eligible Employees." Those directors who
are not regular employees of the Corporation or its Subsidiaries are not
eligible to participate in the Plan.

                  4. Shares Subject to Option.

                           (a) The shares to be issued and delivered by the
Corporation upon exercise of options granted under the Plan are the
Corporation's common shares, 6.25 par value, which may be either authorized but
unissued shares or treasury shares.

                           (b) The aggregate number of common shares of the
Corporation which may be issued under the Plan shall not exceed Twenty-Five
thousand (25,000) shares; subject, however, to the adjustment provided in
Paragraph 8 in the event of stock splits, stock dividends, exchanges of shares
or the like occurring after the effective date of this Plan. No option may be
granted under this Plan which could cause such maximum limit to be exceeded.

                           (c) Common shares covered by an option which is no
longer exercisable with respect to such shares shall again be available for
issuance in connection with other options granted under this Plan.

                  5. Grant of Options. The Board may from time to time, in its
discretion and subject to the provisions of the Plan, grant options to any or
all Eligible Employees. Employees to whom options have been granted are herein
referred to as "Optionees." Each option shall be embodied in an "Option
Agreement" signed by the Optionee and the Corporation providing that the option
shall be subject to the provisions of this Plan and containing such other
provisions as the Board may prescribe not inconsistent with the Plan.

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                  6. Terms and Conditions of Option. All options granted under
the Plan shall contain such terms and conditions as the Board from time to time
determines, subject to the foregoing and following limitations and requirements.

                           (a) Form of Option: Incentive Options and
Non-Qualified Options may be granted under this Plan. An "Incentive Option"
shall mean an option granted under this Plan which is designated to be an
incentive stock option under the provisions of Code Section 422A; and any
provisions elsewhere in this Plan or in any such Incentive Option which would
prevent such option from being an incentive stock option may be deleted and/or
voided retroactively to the date of the granting of such option, by action of
the Board. A "Non-Qualified Option" shall mean an option granted under this Plan
which is not an incentive stock option under the provisions of Code Section
422A. Such Non-Qualified Option shall not be affected by any actions taken
retroactively as provided above with respect to Incentive Options.

                           (b) Option price: The option price per share shall
not be less than 100% of the fair market value of the Corporation's common
shares on the date the option is granted, as determined by the Board in a manner
consistent with the requirements of the Code for incentive stock options.

                           (c) 10% Shareholder: Notwithstanding any other
provision of this Plan, with respect to an Incentive Option granted to an
Optionee who, at the time such option is granted owns stock possessing more than
10 percent of the total combined voting power of all classes of stock of the
Corporation or its Subsidiaries, the option price per share shall be at least
110% of the fair market value of the common shares subject to the option and
such option may not be exercised after the expiration of five years from the
date the option is granted.

                           (d) Period within which option may be exercised:
Except as provided in Paragraph 9 below, not more than the following percentages
of each option granted under this Plan may be exercised prior to the expiration
of the following number of years after the effective date of the grant of such
option:

                                                            Percentage of option
                         Years after effective                 shares eligible
                             date of grant                       for exercise
                             -------------                       ------------

                     Less than 1                                       0%
                     At least 1 but less than 2                       20%
                     At least 2 but less than 3                       40%
                     At least 3 but less than 4                       60%
                     At least 4 but less than 5                       80%
                     At least 5                                      100%

No option may be exercised after the expiration of ten years from the date the
option is granted.

                           (e) Termination of option by reason of termination of
employment: If an Optionee's employment with the Corporation and its
Subsidiaries terminates, all options granted under this Plan to such Optionee
which are not exercisable on the date of such termination of employment shall
immediately terminate. Any remaining options shall terminate if not exercised


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before the expiration of the following periods, or at such earlier time as may
be applicable under paragraph 6(d) above:

                                    (i) seven (7) days following such
         termination of employment, if such termination was not as a result of
         death, disability (disability within the meaning of Code Section
         105(d)(4)), or retirement of the Optionee;

                                    (ii) thirty (30) days following such
         termination of employment, if such termination of employment was
         because of retirement under the provisions of any retirement plan of
         the Corporation and/or any Subsidiary; or

                                    (iii) one (1) year following the date of
         death or commencement of disability, if the Optionee was an employee of
         the Corporation and/or any Subsidiary at the time of his death or the
         commencement of disability.

                           (f) Non-transferability; Exception: Each option and
all rights thereunder shall be exercisable during the Optionee's lifetime only
by him and shall be non-assignable and non-transferable by the Optionee. In the
event of the Optionee's death, such options and rights thereunder are
transferable by his will or by the laws of descent and distribution. In the
event the death of an Optionee occurs, the representative or representatives of
his estate, or the person or persons who acquired (by bequest or inheritance)
the rights to exercise his stock options granted under this Plan, may exercise
any of the unexercised options in whole or in part prior to the expiration of
the applicable exercise period, as specified in Paragraph 6(e) above.

                           (g) More than one option granted to an Optionee: More
than one option, and more than one form of option, may be granted to an Optionee
under this Plan; provided, however, that the aggregate fair market value
(determined as of the time the option is granted) of the shares with respect to
which incentive stock options are exercisable for the first time by any Optionee
during any calendar year (under this Plan and all such plans of the Corporation
and any parent or subsidiary corporation) shall not exceed $100,000. A single
option grant may include both an Incentive Option and a Non-Qualified Option.

                           (h) Compliance with securities laws: Options granted
and shares issued by the Corporation upon exercise of options shall be granted
and issued only in full compliance with all applicable securities laws,
including laws, rules and regulations of the Securities and Exchange Commission
and applicable state Blue Sky laws. With respect thereto, the Board may impose
such conditions on transfer, restrictions and limitations as it may deem
necessary and appropriate to assure compliance with such applicable securities
laws.

                  7. Method of Exercise. An option granted under this Plan that
is eligible to be exercised may be exercised by written notice to the Board,
signed by the Optionee, or by such other person as is entitled to exercise such
option. The notice of exercise shall state the number of shares in respect of
which the option is being exercised, and shall either be accompanied by the
payment of the full option price for such shares, or shall fix a date (not more
than ten business days from the date of such notice) for the payment of the full
purchase price of the shares being purchased. All or any portion of the payment
may be made by the transfer of common shares of the Corporation from the
Optionee to the Corporation, to the extent permitted by law. Such shares shall
be valued for this purpose at their fair market value on the date they are
transferred to the Corporation as payment,


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determined in the same manner as is provided in Paragraph 6(b) hereof. A
certificate or certificates for the common shares of the Corporation purchased
through the exercise of an option shall be issued in regular course after the
exercise of the option and payment therefor. During the option period no person
entitled to exercise any option granted under this Plan shall have any of the
rights or privileges of a shareholder with respect to any shares issuable upon
exercise of such option until certificates representing such shares shall have
been issued and delivered.

                  8. Share Adjustments. In the event there is any change in the
Corporation's common shares resulting from stock splits, stock dividends,
combinations or exchange or shares, or other similar capital adjustments,
equitable proportionate adjustments shall be made by the Board in (a) the number
of shares available for option under this Plan, (b) the number of shares subject
to options granted under this Plan, and (c) the option price of optioned shares.

                  9. Merger, Consolidation, or Sale of Assets. In the event any
person, by any means of purchase or acquisition, becomes the "beneficial owner"
(as defined in Rule 13d-3 promulgated by the Securities and Exchange Commission
under the Securities Exchange Act of 1934 as in effect on December 15, 1987, or
any successor provision thereto) of more than 50% of the outstanding shares of
the Corporation's common stock, then with respect to each Optionee all Incentive
Options and Non-Qualified Options which were outstanding at the time of such
event shall immediately become exercisable in full.

                  In the event of the execution of an agreement of
reorganization, merger or consolidation of the Corporation with one or more
corporations as a result of which the Corporation is not to be the surviving
corporation (whether or not the Corporation shall be dissolved or liquidated) or
the execution of an agreement of sale or transfer of all or substantially all of
the assets of the Corporation, then with respect to each Optionee all Incentive
Options and Non-Qualified Options which were outstanding at the time of such
event shall immediately become exercisable in full, unless such agreement
provides that the successor or transferee corporation shall continue this Plan
and assume all obligations under this Plan in a manner consistent with Code
Section 425(a) as amended or any successor section thereto. If the successor or
transferee corporation does not obligate itself to continue this Plan as
provided above, this Plan and the unexercised portions of all stock options
granted pursuant to this Plan shall terminate as of the effective date of any
such transaction. If practical, the Corporation shall give each Optionee notice
of the execution of the agreement which has caused options to become immediately
exercisable and twenty (20) days prior notice of the effective date of any
possible transaction which would cause the options to terminate.

                  10. Amendment or Termination. The Board may terminate this
Plan at any time, and may amend the Plan at any time or from time to time,
without obtaining any approval of the Corporation's shareholders; except that
the Plan may not be amended (a) to increase the aggregate number of shares
issuable under the Plan (excepting proportionate adjustments made under
Paragraph 8 to give effect to stock splits, etc.); (b) to change the option
price of optioned stock (excepting proportionate adjustments made under
Paragraph 8); (c) to change the requirement that the option price per share of
common stock covered by an option granted under this plan not be less than 100%
of the fair market value of the Corporation's common stock on the date such
option is granted; (d) to extend the time within which options may be granted or
the time within which a granted option may be exercised; or (e) to change,
without the consent of the Optionee (or his, or his estate's, legal
representative), any option previously granted to him under the Plan. If the
Plan


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is terminated, any unexercised option shall continue to be exercisable in
accordance with its terms and the terms of this Plan, except as provided in
Paragraph 9 above.

                  11. Corporation Responsibility. All expenses of this Plan,
including the cost of maintaining records, shall be borne by the Corporation.
The Corporation shall have no responsibility or liability (other than under
applicable Securities Acts) for any act or thing done or left undone with
respect to the price, time, quantity, or other conditions and circumstances of
the purchase of shares under the terms of the Plan, so long as the Corporation
acts in good faith.

                  12. Implied Consent of Optionees. Every Optionee, by his
acceptance of an option under this Plan, shall be deemed to have consented to be
bound, on his own behalf and on behalf of his heirs, assigns, and legal
representatives, by all of the terms and conditions of this Plan.

                  13. No Effect on Employment Status. The fact that an employee
has been granted an option under this Plan shall not limit or otherwise qualify
the right of his employer to terminate his employment at any time.

                  14. Duration and Termination of the Plan. The Plan shall
become effective on December 15, 1987, if approved and adopted by majority vote
of the shareholders of the Corporation within twelve months after such date; and
if not so approved and adopted, shall be of no force and effect. No option shall
be granted under the Plan subsequent to December 14, 1997.