WESTAMERICA BANCORPORATION
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                       SCHEDULE 14A INFORMATION

          Proxy Statement Pursuant to Section 14(a) of the
                   Securities Exchange Act of 1934

Filed by the Registrant [X]
Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[X] Preliminary Proxy Statement
[ ] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Soliciting Material Pursuant to Section 240.14a-11(c) or
    Section 240.14a-12

                           WestAmerica Bancorporation
                (Name of Registrant as Specified In Its Charter)

                           WestAmerica Bancorporation
                   (Name of Person(s) Filing Proxy Statement)

Payment of Filing Fee (Check the appropriate box):

[X] $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), or 14a-6(j)(2).
[ ] $500 per each party to the controversy pursuant to Exchange Act Rule
    14a-6(i)(3).
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.
[ ] Check box if any part of the fee is offset as provided by Exchange Act
    Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
    paid previously. Identify the previous filing by registration number, or
    the Form or Schedule and the date of its filing.


<PAGE>

                        WESTAMERICA BANCORPORATION LOGO


                              1108 FIFTH AVENUE
                         SAN RAFAEL, CALIFORNIA 94901
                                March 21, 1995

To Our Shareholders:

   The Annual Meeting of Shareholders of Westamerica Bancorporation will be held
at 7:30 p.m. on Tuesday,  April 25, 1995, at the Showcase Theatre, Marin Center,
San Rafael, California, as stated in the formal notice accompanying this letter.
We hope you will plan to attend.

   At the Annual Meeting, the shareholders will be asked to elect directors,  to
approve an  amendment  to the  Restated  Articles of  Incorporation  which would
increase the number of shares of authorized Common Stock, to approve a new stock
option plan, to approve the selection of independent  auditors and to consider a
shareholder proposal.

     Please sign and return the  enclosed  proxy as promptly as possible so that
your shares may be represented  at the Annual  Meeting.  If you attend,  you may
vote in person even though you previously returned your proxy.

   We look  forward to seeing you at the Annual  Meeting on  Tuesday,  April 25,
1995.

                                        Sincerely,


                                                               
                                        ------------------------
                                        DAVID L. PAYNE
                                        Chairman of the Board

                          
<PAGE>

                          WESTAMERICA BANCORPORATION
                              1108 FIFTH AVENUE
                         SAN RAFAEL, CALIFORNIA 94901
                                   ----------
           NOTICE OF ANNUAL MEETING OF SHAREHOLDERS--APRIL 25, 1995

To the Shareholders of WESTAMERICA BANCORPORATION:

     The Annual Meeting of  Shareholders  will be held at the Showcase  Theatre,
Marin Center, San Rafael,  California,  on Tuesday, April 25, 1995, at 7:30 p.m.
for the purpose of:

     1. Electing 12 directors;

     2. Approving an amendment to the Restated Articles of Incorporation which
   would increase the number of shares of authorized Common Stock;

     3. Approving a new stock option plan;

     4. Approving the selection of independent auditors for 1995;

     5. Consideration of a shareholder proposal to change the method of
   compensating the members who serve on the Board of Directors;

     6. Transacting such other business as may properly come before the
   Annual Meeting.

     Shareholders  of record  at the close of  business  on March 1,  1995,  are
entitled  to  notice of and to vote at the  Annual  Meeting  or any  adjournment
thereof.  You are cordially invited to attend the Annual Meeting.  If you do not
expect to be present,  please complete, sign and date the accompanying proxy and
mail it at once in the  enclosed  envelope.  No postage is  necessary  if mailed
within the United States.

     WESTAMERICA  BANCORPORATION'S  ANNUAL  REPORT  FOR THE  FISCAL  YEAR  ENDED
DECEMBER 31, 1994 IS ENCLOSED.  THE ANNUAL REPORT  CONTAINS  FINANCIAL AND OTHER
INFORMATION ABOUT THE ACTIVITIES OF WESTAMERICA BANCORPORATION, BUT IT IS NOT TO
BE DEEMED A PART OF THE PROXY SOLICITING MATERIALS.

                                                  BY ORDER OF THE BOARD OF
                                                   DIRECTORS


                                                 
                                                  -----------------------------
                                                  Mary Anne Bell
                                                  Assistant Corporate Secretary

Dated: March 21, 1995

- --------------------------------------------------------------------------------
|                             YOUR VOTE IS IMPORTANT                          
|                                                                              |
|    YOU ARE URGED TO COMPLETE, SIGN, DATE AND PROMPTLY RETURN YOUR PROXY SO   |
|    THAT YOUR SHARES MAY BE VOTED IN ACCORDANCE WITH YOUR WISHES.             |
|                                                                              |
- --------------------------------------------------------------------------------

                            

<PAGE>
                              TABLE OF CONTENTS

                                                                    PAGE
                                                                   --------
     GENERAL ....................................................     1

     ELECTION OF DIRECTORS ......................................     2

     CERTAIN INFORMATION ABOUT THE BOARD OF DIRECTORS AND
      CERTAIN COMMITTEES OF THE BOARD ...........................     5

     EXECUTIVE OFFICERS .........................................     6


     SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
      MANAGEMENT ................................................     8

     EXECUTIVE COMPENSATION .....................................    11

     RETIREMENT BENEFITS AND OTHER ARRANGEMENTS .................    12

     BOARD COMPENSATION COMMITTEE REPORT ........................    14

     STOCK PERFORMANCE CHART ....................................    16

     APPROVAL OF AMENDMENT OF THE RESTATED ARTICLES OF
      INCORPORATION .............................................    16

     APPROVAL OF THE CORPORATION'S STOCK OPTION PLAN OF 1995  ...    17

     APPROVAL OF AUDITORS .......................................    19

     SHAREHOLDER PROPOSAL .......................................    20

     OTHER MATTERS ..............................................    21

     EXHIBIT A

<PAGE>
                           WESTAMERICA BANCORPORATION
                               1108 FIFTH AVENUE
                          SAN RAFAEL, CALIFORNIA 94901
                                ---------------
                                PROXY STATEMENT
                                 March 21, 1995
                                ---------------
                                    GENERAL

     This proxy  statement is furnished in connection  with the  solicitation of
proxies by the Westamerica Bancorporation (the "Corporation") Board of Directors
(the "Board") for use at the Annual Meeting of  Shareholders  to be held at 7:30
p.m.,  Tuesday,  April 25, 1995,  at the Showcase  Theatre,  Marin  Center,  San
Rafael,  California,  for the purposes set forth in the  accompanying  Notice of
Annual Meeting of Shareholders  (the "Meeting").  This proxy statement and proxy
were first mailed to shareholders on or about March 21, 1995.

     Voting  Rights and Vote  Required.  Shareholders  of record at the close of
business on March 1, 1995, the record date, are entitled to vote at the Meeting.
On that date,  9,237,141 shares of stock were outstanding.  The determination of
shareholders  entitled  to vote at the  Meeting and the number of votes to which
they are entitled was made on the basis of the  Corporation's  records as of the
record date.

     Each  share is  entitled  to one  vote,  except  that with  respect  to the
election  of  directors,  a  shareholder  may  cumulate  votes as to  candidates
nominated prior to voting if any shareholder  gives notice of intent to cumulate
votes at the Meeting prior to the voting.  If any shareholder gives such notice,
all shareholders may cumulate their votes for nominees. Under cumulative voting,
each share  carries as many votes as the number of directors to be elected,  and
the  shareholder  may cast all of such votes for a single  nominee or distribute
them in any manner among as many nominees as desired.

     In the election of directors,  the 12 nominees receiving the highest number
of votes will be elected.  Approval of an amendment to the Restated  Articles of
Incorporation will require the affirmative vote of a majority of the outstanding
Common  Stock  of the  Corporation.  Approval  of a new  stock  option  plan and
approval  of  the  selection  of  the  independent  auditors  will  require  the
affirmative  vote of a  majority  of the  shares  represented  and voting at the
Meeting.  Approval of the  shareholder's  proposal which  proposes  changing the
method  of  compensating  the  members  of  the  Board  will  also  require  the
affirmative  vote of a  majority  of the  shares  represented  and voting at the
Meeting.  Abstentions  will not  count as  votes  in  favor of the  election  of
directors or any of the other proposals.

     Quorum.  A majority of the shares entitled to vote,  represented  either in
person or by a properly executed proxy, will constitute a quorum at the Meeting.
Shares  which  abstain  from voting and "broker  non-votes"  (shares as to which
brokerage  firms have not received  voting  instructions  from their clients and
therefore do not have the  authority to vote the shares at the Meeting)  will be
counted for purposes of determining a quorum only.

     Voting of Proxies.  The shares represented by all properly executed proxies
received  in  time  for the  Meeting  will  be  voted  in  accordance  with  the
shareholders'  choices  specified  therein;  provided,  however,  that  where no
choices have been  specified,  the shares will be voted to approve the amendment
to the Restated Articles of  Incorporation,  to approve a new stock option plan,
to approve the selection of KPMG Peat Marwick LLP as independent auditors and to
disapprove the  shareholder's  proposal to change the method of compensating the
members of the Board.  When exercising the powers granted to proxy holders under
the caption  "ELECTION OF DIRECTORS,"  the shares will be voted for the election
of directors in the manner described therein.

     The Board knows of no matters to be brought  before the Meeting  other than
the election of directors, the approval of an amendment to the Restated Articles
of  Incorporation,  the approval of a new stock option  plan,  the  selection of
independent auditors for 1995 and the consideration of a shareholder's

                                1

<PAGE>
proposal. If, however, any other matters of which the Board is not now aware are
properly presented for action, it is the intention of the proxy holders named in
the enclosed form of proxy to vote such proxy on such matters in accordance with
their best business judgment.

     Revocability of Proxy. The delivery of the enclosed proxy does not preclude
the shareholder delivering the proxy from voting in person or changing the proxy
should  the  shareholder  so  desire.  The  proxy  may be  revoked  by a written
directive  to the  Corporation,  by  another  proxy  subsequently  executed  and
presented at the Meeting at any time prior to the actual voting or by attendance
and voting at the Meeting.

     Shareholder  Proposals.  Proposals of  shareholders  to be  considered  for
inclusion in the  Corporation's  annual proxy  statement  for next year's annual
meeting must be received at the  Corporation's  executive  offices at 1108 Fifth
Avenue, San Rafael, California 94901, no later than November 21, 1995.

                             ELECTION OF DIRECTORS

     The number of  directors  of the Board to be elected at the Meeting to hold
office for the ensuing year and until their successors are elected and qualified
is 12. It is the intention of the proxy  holders named in the enclosed  proxy to
vote such proxies (except those  containing  contrary  instructions)  for the 12
nominees named below.

     The Board does not  anticipate  that any of the nominees  will be unable to
serve as a director,  but if that should  occur  before the  Meeting,  the proxy
holders  reserve the right to substitute as nominee and vote for another  person
of their  choice in the place and stead of any nominee  unable so to serve.  The
proxy holders  reserve the right to cumulate votes for the election of directors
and cast all of such votes for any one or more of the nominees, to the exclusion
of the  others,  and in such  order  of  preference  as the  proxy  holders  may
determine in their discretion.

     Nominees.  The nominees for election to the office of director of the Board
are named and  certain  information  with  respect to them is given  below.  The
information  has been furnished to the  Corporation by the respective  nominees.
All of the nominees have engaged in their  indicated  principal  occupation  for
more than five years, unless otherwise indicated.


                                                                        DIRECTOR
NAME OF NOMINEE                 PRINCIPAL OCCUPATION                       SINCE
- -------------------  -------------------------------------------------  --------

Etta Allen ......... Mrs. Allen,  born in 1929, is president and owner     1988
                     of Allen Heating and Sheet Metal of Greenbrae,  a
                     company which she and her late husband founded in
                     1957.  Mrs.  Allen is a  licensed  contractor  in
                     heating,  ventilating, air conditioning and sheet
                     metal and is active in various building  industry
                     organizations,   as  well  as  many   civic   and
                     community  activities.  She also owns Sunny Slope
                     Ranch, a vineyard in Sonoma County. Mrs. Allen is
                     a  director  of the  State  Assistance  Fund  for
                     Enterprise  Business and  Industrial  Development
                     Corporation.  She is a  director  of  Westamerica
                     Bank, a wholly owned  banking  subsidiary  of the
                     Corporation  ("WAB"),  and a member  of the Audit
                     Committee   and   the   Employee   Benefits   and
                     Compensation Committee.

Louis E. Bartolini ..Mr. Bartolini, born in 1932, retired in 1988 as a     1991
                     vice  president  and financial  consultant  after
                     being with Merrill Lynch, Pierce, Fenner & Smith,
                     Inc. since 1961. A resident of Marin County since
                     1959,  Mr.  Bartolini  has been active in various
                     community,     charitable     and     educational
                     organizations  and presently serves on the boards
                     of  several  of  these  organizations.  He  is  a
                     director  of  WAB  and  a  member  of  the  Audit
                     Committee and the Nominating Committee.

                                       2

<PAGE>
                                                                        DIRECTOR
NAME OF NOMINEE                 PRINCIPAL OCCUPATION                       SINCE
- -------------------  -------------------------------------------------  --------
Charles I. 
Daniels, Jr. ....    Mr. Daniels, born in 1926, is president and owner     1989
                     of House of Daniels,  Inc., of Novato, a beverage
                     distribution  firm begun in 1933,  which operates
                     through  its three sales  companies,  Golden Gate
                     Distributing Company, Redwood Vintners and Golden
                     Gate  Liquors,  covering the northern  California
                     market.  Mr.  Daniels  is  active  in  community,
                     professional and  trade-related  associations and
                     is a  California  director  of the Wine & Spirits
                     Wholesalers  of America.  He is a director of WAB
                     and a  member  of the  Audit  Committee  and  the
                     Nominating Committee.
                             
Don Emerson .........Mr. Emerson, born in 1928, was president of Calso     1979
                     Company  (the  holding   company  that  owns  the
                     formula  and name  "Calso  Water,"  a  carbonated
                     mineral water).  He presently devotes his time to
                     personal  investments.  Mr. Emerson is a director
                     of Bank of Lake County,  a wholly-  owned banking
                     subsidiary of the Corporation  ("BLC"),  and WAB.
                     He is a member of the  Executive  Committee,  the
                     Employee Benefits and Compensation  Committee and
                     the Nominating Committee.
                             
Arthur C. Latno, Jr. Mr. Latno,  born in 1929,  was an Executive  Vice     1985
                     President  for Pacific  Telesis  Group  (formerly
                     Pacific  Telephone  Co.)  in San  Francisco  from
                     1978,  having  worked for the  telephone  company
                     since 1954.  Mr. Latno  retired from that company
                     in November of 1992. He is director of WAB and is
                     Chairman of the Nominating Committee and a member
                     of the Executive Committee, the Employee Benefits
                     and  Compensation  Committee  and  the  Loan  and
                     Investment Committee.
                             
Patrick D. Lynch ... Mr.  Lynch,  born in 1933,  is a  consultant  and     1986
                     director for several high technology  firms. From
                     1987 to 1989 he was president of  Microphoretics,
                     which    manufactured    instruments    for   the
                     biochemistry  market.  In  1989,   Microphoretics
                     declared  bankruptcy  under  Chapter  11  of  the
                     Bankruptcy Code and was subsequently  liquidated.
                     From 1985 to 1987 he was  president and a partner
                     of  Byars  &  Lynch   International,   Inc.,   an
                     engineering consulting firm in Santa Clara. He is
                     a director of WAB and is Chairman of the Employee
                     Benefits and Compensation  Committee and a member
                     of the  Executive  Committee  and  the  Loan  and
                     Investment Committee.
                             
Catherine Cope 
MacMillan  ......... Ms.  MacMillan,  born in 1947,  is president  and     1985
                     owner of The Firehouse  Restaurant in Sacramento.
                     In  addition  to  the  restaurant  business,  Ms.
                     MacMillan   participates   in   numerous   civic,
                     community and trade  activities in the Sacramento
                     community.  She is a  director  of  WAB  and is a
                     member of the Employee  Benefits and Compensation
                     Committee,  the Nominating Committee and the Loan
                     and Investment Committee.

                                       3

<PAGE>
                                                                        DIRECTOR
NAME OF NOMINEE                 PRINCIPAL OCCUPATION                       SINCE
- -------------------  -------------------------------------------------  --------
Dwight H. Murray, 
Jr., M.D. .......... Dr.  Murray,  born in 1927,  was appointed to the     1993
                     Board  in  August  of  1993.  He  is  a  founding
                     director  of Napa  Valley  Bank,  a  wholly-owned
                     banking subsidiary of the Corporation ("NVB") and
                     is a member of its Directors' Audit Committee. He
                     was a founding  director of Napa  Valley  Bancorp
                     and  served on that board  until its merger  into
                     the Corporation in April of 1993. Dr. Murray is a
                     self- employed vascular general surgeon and is an
                     Associate   Clinical   Professor  of  Surgery  at
                     University of California at San Francisco.  He is
                     a director on the Corporate Board of Blue Shield,
                     and formerly served a tenure as Chief of Staff of
                     Queen of the Valley Hospital in Napa.
                             
Ronald A. Nelson ... Mr.  Nelson,  born in 1942, is vice  president of     1988
                     Charles M. Schulz Creative Associates,  a general
                     partner  in  various  Schulz   partnerships   and
                     trustee for various  Schulz trusts and the Schulz
                     foundation,  with  responsibility  for all Schulz
                     business and financial matters including licensed
                     use of the  Peanuts  characters.  He is also vice
                     president of Redwood Empire Ice Arena,  Woodstock
                     Aviation  and  C.B.  Properties,  Inc.  He  is  a
                     director  of WAB  and is  Chairman  of the  Audit
                     Committee  and a member of the Employee  Benefits
                     and Compensation Committee.
                             
Carl R. Otto ....... Mr.  Otto,  born in 1946,  is the  President  and     1992
                     Chief Executive  Officer of John F. Otto, Inc., a
                     general  contracting firm in Sacramento,  as well
                     as a director of The Freeport  Company,  the real
                     estate  holding  company  that owns John F. Otto,
                     Inc.  Mr.  Otto is also a director of Corey Delta
                     Corp.,  a  Benicia  construction  firm.  He  is a
                     director  of WAB  and is a  member  of the  Audit
                     Committee.
                             
David L. Payne ..... Mr. Payne, born in 1955, has been Chairman of the     1984
                     Board  of both  the  Corporation  and  WAB  since
                     January of 1988 and was  appointed  President and
                     Chief Executive  Officer in November of 1989. Mr.
                     Payne holds the following  additional  positions:
                     President  of  Westamerica  Bank  Properties,   a
                     wholly-owned    real   estate   holding   company
                     subsidiary of WAB ("WABP");  Chairman,  President
                     and Chief Executive  Officer of Community  Banker
                     Services Corporation,  a wholly-owned  subsidiary
                     of the Corporation  ("CBSC");  Chairman and Chief
                     Executive  Officer of  Westcore,  a  wholly-owned
                     employee  benefits  subsidiary of the Corporation
                     ("Westcore");   Chairman  of  Weststar   Mortgage
                     Corporation,  a wholly-owned  mortgage  servicing
                     subsidiary of CBSC ("WMC");  and director of NVB.
                     He is President  and Chief  Executive  Officer of
                     Gibson Printing and Publishing Company and Gibson
                     Radio   and   Publishing   Company,   which   are
                     newspaper,  commercial  printing  and real estate
                     investment  companies  headquartered  in Vallejo.
                     Mr.  Payne  served on the board of  directors  of
                     Vaca    Valley   Bank   from   1982   until   its
                     consolidation with WAB in 1983. He is Chairman of
                     the  Executive  Committee  and a  member  of  the
                     Nominating Committee.

                                       4
<PAGE>
                                                                        DIRECTOR
NAME OF NOMINEE                 PRINCIPAL OCCUPATION                      SINCE
- -------------------  -------------------------------------------------  --------
Edward B. Sylvester  Mr.  Sylvester,  born in  1936,  is the  owner of     1979
                     Sylvester Engineering,  Inc., a civil engineering
                     and  planning  firm.  He takes an active  lead in
                     various  civic   activities  in  Nevada   County,
                     especially  in the business  community and in the
                     county's   transportation    improvements.    Mr.
                     Sylvester  served as a director  of Gold  Country
                     Bank  from its  incorporation  in 1974  until its
                     consolidation  with WAB in 1983. He is a director
                     of  WAB  and  is  a  member   of  the   Executive
                     Committee,   the  Nominating   Committee  and  is
                     Chairman of the Loan and Investment Committee.


                CERTAIN INFORMATION ABOUT THE BOARD OF DIRECTORS
                      AND CERTAIN COMMITTEES OF THE BOARD

     The Board held a total of 13 meetings during 1994. Every director  attended
at least 75% of the aggregate of: (i) the 13 Board meetings; and (ii) all of the
Committee meetings of such Committee on which such director served.

     Committees of the Board. The Board has an Executive Committee,  the members
of which are D. L. Payne,  Chairman,  D. Emerson,  A. C. Latno, Jr., P. D. Lynch
and E. B. Sylvester. The Board delegates to the Executive Committee,  subject to
control  of the Board and  subject  to the  limitations  of  California  General
Corporation  Law, any powers and authority of the Board in the management of the
business  and  affairs  of the  Corporation.  The  Executive  Committee  held 12
meetings in 1994.

     The Board has an Audit  Committee,  the members of which are R. A.  Nelson,
Chairman,  E. Allen,  L. E.  Bartolini,  C. I. Daniels,  Jr. and C. R. Otto. The
Audit  Committee  reviews  with  the  Corporation's   independent  auditors  and
management the Corporation's  accounting principles,  policies and practices and
its  reporting  policies and  practices.  The Audit  Committee  reviews with the
independent auditors the plan and results of the auditing engagement and reviews
the scope and results of the  procedures  of the  Corporation's  internal  Audit
Department.  The Audit Committee conducts  investigations of the adequacy of the
Corporation's  internal  accounting  procedures  and reviews the results of such
investigations  with the Corporation's  internal audit staff and with the Board.
The Audit  Committee  reviews  the  reports of  examinations  conducted  by bank
regulatory authorities. The Audit Committee held 11 meetings in 1994.

     The Board has an Employee Benefits and Compensation Committee,  the members
of which are P. D. Lynch,  Chairman,  E. Allen, D. Emerson, A. C. Latno, Jr., C.
C. MacMillan and R. A. Nelson. The Employee Benefits and Compensation  Committee
administers and carries out the terms of the Corporation's employee stock option
plans as well as the tax deferred  savings and  retirement  plans.  The Employee
Benefits and Compensation  Committee administers the Corporation's  compensation
programs and reviews and recommends to the Board the compensation  level for the
executive  officers  of the  Corporation  and  its  subsidiaries.  The  Employee
Benefits  and  Compensation  Committee  also  reviews  the  performance  of  and
recommends  promotions  for  the  executive  officers  of the  Corporation.  The
Employee Benefits and Compensation Committee held 12 meetings in 1994.

     The Board has a Nominating  Committee  for the election of  directors,  the
members of which are A. C. Latno, Jr., Chairman, L. E. Bartolini, C. I. Daniels,
Jr.,  D.  Emerson,  C. C.  MacMillan,  D. L.  Payne  and E.  B.  Sylvester.  The
Nominating Committee is responsible for reviewing the fees paid to directors for
attendance  at Board and  Committee  meetings  and making  recommendations  with
respect thereto. The Nominating Committee will consider shareholder  nominations
for  election to the Board  submitted  in  accordance  with  section 2.14 of the
Bylaws  of  the  Corporation  ("Section  2.14").   Section  2.14  requires  that
nominations be submitted in writing to the Secretary (or Assistant Secretary) of
the Corporation  within not less than 14 days nor more than 50 days prior to the
annual meeting at which directors will be elected and that  nominations  contain
certain  specified   information   regarding  the  nominee  and  the  nominating
shareholder. The Nominating Committee held 2 meetings in 1994.

                                       5

<PAGE>
     The Board has a Loan and Investment Committee,  the members of which are E.
B. Sylvester,  Chairman, A. C. Latno, Jr., P. D. Lynch and C. C. MacMillan.  The
Loan and  Investment  Committee is  responsible  for  reviewing  major loans and
investment  policies and for monitoring the activities  related to the Community
Reinvestment Act. The Loan and Investment Committee met 12 times in 1994.

     Directors' Fees. During 1994, directors of the Corporation and WAB received
an annual retainer of $14,000. Each director received $1,000 for each meeting of
the Board that he or she  attended,  except that if the director was a member of
the Board of both the  Corporation  and a subsidiary bank and both Boards met on
the same day, the director only received a single $1,000 fee for attending  both
meetings.

     During 1994, nonemployee directors received $500 for each Committee meeting
of the Board  attended.  The Chairman of each  Committee  received an additional
$250, for a total of $750, for each Committee meeting attended.  The Chairman of
the Board,  D. L. Payne,  is  compensated  as an employee and did not receive an
annual retainer or director's fees.

     Indebtedness  of  Directors  and  Management.  Certain  of  the  directors,
executive  officers  and their  associates  have had banking  transactions  with
subsidiaries  of the  Corporation  in  the  ordinary  course  of  business.  All
outstanding  loans and commitments  included in such  transactions  were made on
substantially the same terms, including interest rates and collateral,  as those
prevailing at the time for comparable  transactions with other persons,  did not
involve  more than a normal risk of  collectibility  and did not  present  other
unfavorable features.


                               EXECUTIVE OFFICERS

     The executive  officers of the Corporation and WAB serve at the pleasure of
the  Board  and are  subject  to  annual  appointment  by the Board at its first
meeting  following the Annual Meeting of  Shareholders.  It is anticipated  that
each of the executive officers listed below will be reappointed to serve in such
capacities  at the  first  meeting  of the  Board  following  the  Meeting.  The
executive  officers  include  David L.  Payne,  President  and  Chief  Executive
Officer, about whom information is provided above, and the following persons:

                                                                            HELD
NAME OF EXECUTIVE                           POSITION                       SINCE
- ------------------ ------------------------------------------------------  -----
James M. Barnes  .. Mr. Barnes, born in 1953, is Executive Vice President   1985
                    and Chief  Financial  Officer for the Corporation and
                    WAB  and  is  also   Manager  of  the   Finance   and
                    Administration  Division  of WAB.  He is a  director,
                    Executive Vice President and Chief Financial  Officer
                    for WABP, a director and Chief  Financial  Officer of
                    CBSC and a director,  eXecutive  Vice  President  and
                    Chief Financial Officer of WMC. He is also a director
                    and Chief  Financial  Officer of Westcore.  Following
                    four years with the First  National  Bank of Chicago,
                    Mr.  Barnes joined the Bank of  California,  where he
                    held various  financial  management  positions during
                    his six-year tenure,  holding the office of Treasurer
                    prior to joining the Corporation in 1985.
                   
E. Joseph Bowler... Mr.  Bowler,  born in 1936, is Senior Vice  President   1980
                    and Treasurer for both the Corporation and WAB and is
                    head of WAB's Treasury Division. He is a director and
                    President of WMC,  Treasurer of CBSC  and Senior Vice
                    President  and  Treasurer  for both NVB and BLC.  Mr.
                    Bowler joined the  Corporation  in 1972 as Investment
                    Officer  and  received  various  officer  promotions,
                    being  promoted  to  Treasurer  in 1980 and to Senior
                    Vice  President in 1983. Mr. Bowler began his banking
                    career in San Francisco in 1963.

                                       6

<PAGE>
                                                                            HELD
NAME OF EXECUTIVE                     POSITION                             SINCE
- ------------------  -----------------------------------------------------  -----
Robert W. Entwisle  Mr. Entwisle,  born in 1947, is Senior Vice President   1986
                    in  charge  of the  Banking  Division  of  WAB  which
                    entails  the  overall  supervision  of  WAB's  branch
                    system.  He is also a  director  of  WMC,  a director
                    and Senior Vice  President of CBSC and a director and
                    Senior Vice President of Westcore. Mr Entwisle joined
                    WAB in  1980  as  Vice  President  in the  commercial
                    lending area and has held the positions of Manager of
                    Corporate  Banking as well as Regional Vice President
                    of the Solano and northern  Marin County  branches of
                    WAB. He was promoted to Senior Vice  President of the
                    Corporation in 1985.

Evan N. Fricker  .. Mr.  Fricker,  born in 1938,  is Vice  President  and   1983
                    General  Auditor for the  Corporation  and WAB and is
                    responsible   for   all   audit   functions   of  the
                    Corporation  and its  subsidiaries.  Mr.  Fricker has
                    been  a  Chartered  Bank  Auditor  since  1984  and a
                    Certified Public Accountant since 1969.

Charles L. Fritz... Mr. Fritz,  born in 1936, is Executive Vice President   1988
                    and Chief Credit Officer of the Corporation, WAB, NVB
                    and  BLC.  He is  responsible  for WAB and all  other
                    subsidiary  banks'  lending  functions to ensure that
                    the loan  portfolios meet  established  objectives in
                    terms  of  credit  quality,   risk   diversification,
                    profitability  and funds  allocation.  Since 1975 and
                    before  joining WAB in 1988,  Mr.  Fritz held various
                    management  positions in the lending area at Barclays
                    Bank of California.

Dennis R. Hansen...  Mr.   Hansen,   born  in  1950,  is  Senior  Vice      1978
                     President and Controller for the  Corporation and
                     is Senior Vice President,  Controller and Cashier
                     for WAB. In  addition,  Mr.  Hansen is a director
                     and Senior Vice  President  of WABP,  Senior Vice
                     President and Chief Financial  Officer of NVB and
                     BLC and  Controller  of CBSC  and  Westcore.  His
                     responsibilities   include  financial   planning,
                     accounting  and  reporting,  risk  management and
                     other  accounting-  related  matters.  Mr. Hansen
                     joined the Corporation in 1978 as Controller, was
                     promoted  to Vice  President  in 1979 and  Senior
                     Vice  President  in 1983.  Mr.  Hansen has been a
                     member  of  the   American   Institute   and  the
                     California    Society   of    Certified    Public
                     Accountants since 1974.

                                       7

<PAGE>
                                                                            HELD
NAME OF EXECUTIVE                     POSITION                             SINCE
- ------------------  -----------------------------------------------------  -----
Thomas S. Lenz  ... Mr. Lenz,  born in 1937, is Senior Vice President and   1989
                    Chief Credit  Administrator of WAB. He is also Senior 
                    Vice  President  of CBSC.  He  manages  WAB's  Credit
                    Administration   Division,   supervises  approval  of
                    credits,    including   their    administration   and
                    monitoring,  in  accordance  with  WAB's  established
                    policies   and    procedures    relating   to   risk,
                    profitability,    funds   allocation   and   business
                    development objectives.  He shares responsibility for
                    the quality and profitability of WAB's loan portfolio
                    with WAB's Chief Credit Officer. Prior to joining WAB
                    in 1989,  Mr.  Lenz had been  employed  since 1976 by
                    Barclays   Bank  of   California   in  a  variety  of
                    positions,  his last being Senior Vice  President and
                    Manager of Branch Loan Administration. Prior to that,
                    he was Regional Manager of that bank's 35-unit branch
                    system in northern California.

Hans T. Y. Tjian... Mr. Tjian,  born in 1939,  joined WAB in May of 1989,   1989
                    as  Senior   Vice   President   and  Manager  of  the
                    Operations and Systems Administration Division. He is
                    also a director  and Senior Vice  President  of CBSC.
                    His  responsibilities  include data processing,  item
                    processing,  loan operations and bank  administrative
                    services.  Prior to  joining  WAB,  Mr.  Tjian  was a
                    senior   vice   president   at  Wells   Fargo   Bank,
                    responsible  for product  management,  finance,  risk
                    management  and planning for the  Wholesale  Services
                    Group.  Mr.  Tjian has been  involved  in the banking
                    business  since  1969  and  his  experience  includes
                    operations,  computer systems  management,  strategic
                    planning and credit policy.

                        SECURITY OWNERSHIP OF CERTAIN
                       BENEFICIAL OWNERS AND MANAGEMENT

     Security Ownership of Certain Beneficial Owners. The following table shows,
to the best knowledge of the Corporation,  the beneficial owners of more than 5%
of the Corporation's  outstanding shares as of February 1, 1995. For the purpose
of this  disclosure  and the  disclosure  of ownership  of shares by  management
below,  shares are  considered to be  "beneficially"  owned if the person has or
shares  the  power to vote or direct  the  voting  of the  shares,  the power to
dispose  of or direct the  disposition  of the  shares,  or the right to acquire
beneficial ownership (as so defined) within 60 days of February 1, 1995.

<TABLE>
<CAPTION>
                                                        AMOUNT AND NATURE OF BENEFICIAL OWNERSHIP
                                                 ------------------------------------------------------
                                                    SOLE     SHARED      SOLE        SHARED     PERCENT
                                                   VOTING    VOTING   INVESTMENT   INVESTMENT     OF
                                                    POWER    POWER      POWER        POWER       CLASS
                                                 ---------   ------  ------------ ------------ ---------
<S>                                              <C>         <C>     <C>            <C>          <C>
Alpha Capital Company, Inc. ("Alpha")   
1425 Leimert Boulevard Suite 400
Oakland, CA 94602(1)............................   --        --      536,403        --           7.65%

J. P. Morgan & Co. Incorporated ("J.P. Morgan")  
60 Wall Street
New York, NY 10260(2)...........................  317,100     --      462,600        --           5.00

<FN>
- ----------
(1) Based upon information provided in Alpha's 5% Ownership Questionnaire.
(2) Based upon information provided in J.P. Morgan's Schedule 13G for the
    period ended December 31, 1994.

</TABLE>
                                       8

<PAGE>
   Security Ownership of Directors and Management. The following table shows the
number of shares and the percentage of the shares beneficially owned (as defined
above) by each of the current directors, by each of the nominees for election to
the office of director,  by the Chief Executive  Officer and the four other most
highly  compensated  executive  officers  and by  all  directors  and  executive
officers of the Corporation as a group as of February 1, 1995.

<TABLE>
<CAPTION>
                                              AMOUNT AND NATURE OF BENEFICIAL OWNERSHIP
                                 ------------------------------------------------------------------
                                      SOLE        SHARED        RIGHT TO
                                   VOTING AND   VOTING AND   ACQUIRE WITHIN              PERCENT OF
                                   INVESTMENT   INVESTMENT     60 DAYS OF                SHARES OF 
     NAMES                           POWER        POWER    FEBRUARY 1,1995(1)  TOTAL(2)   CLASS(3
     -----                       ------------ ------------ ------------------ --------- -----------
<S>                              <C>          <C>          <C>                <C>           <C>
Etta Allen(4) .................    3,551                                        3,551         *
Louis E. Bartolini(5) .........      600                                          600         *
Charles I. Daniels, Jr.  ......      676                                          676         *
Don Emerson ...................   21,475                                       21,475         *
Arthur C. Latno, Jr.(6)  ......    1,038                                        1,038         *
Patrick D. Lynch ..............      500                                          500         *
Catherine C. MacMillan ........      500                                          500         *
Dwight H. Murray, Jr.(7)  .....   59,881                                       59,881         *
Ronald A. Nelson ..............   12,000                                       12,000         *
Carl R. Otto ..................    1,500                                        1,500         *
David L. Payne(8) .............  190,886       3,069        45,633            239,588       2.58%
Edward B. Sylvester(9) ........   26,775                                       26,775         *
James M. Barnes ...............    7,100       3,118        51,210             61,428         *
Robert W. Entwisle(10) ........    4,989       1,956        26,150             33,095         *
Hans T. Y. Tjian(11) ..........   15,207       3,037        20,133             38,377         *
Charles L. Fritz(12) ..........   14,800       2,952        12,333             30,085         *
All 20 Directors and Executive
 Officers as a group ..........  377,455      30,759       208,009            616,213        6.52

<FN>
  *  Indicates that the percentage of the outstanding shares beneficially
     owned is less than one percent (1%).

 (1) Includes restricted performance shares vesting on March 31, 1995.

 (2) Includes directors' qualifying shares.

 (3) In calculating the percentage of ownership, all shares which the
     identified  person or  persons  have the right to acquire  by  exercise  of
     options  are deemed to be  outstanding  for the  purpose of  computing  the
     percentage  of the  class  owned by such  person  but are not  deemed to be
     outstanding  for the purpose of computing the percentage of the class owned
     by any other person.

 (4) Includes 3,100 shares held in a trust as to which Mrs. Allen is trustee.

 (5) Includes 300 shares held in a profit sharing account for the benefit of
     Mr. Bartolini.

 (6) Includes 400 shares owned by Mr. Latno's wife as to which Mr. Latno
     disclaims beneficial ownership.

 (7) Includes  1,669 shares owned by Dr.  Murray's wife, 397 shares owned by Dr.
     Murray's wife as custodian for their  grandchildren  and 9,294 shares owned
     by Dr. Murray's  father-in-law who resides in the family home, as to all of
     which Dr. Murray disclaims beneficial ownership.

 (8) Includes 176,279 shares owned by Gibson Radio and Publishing Company, of
     which Mr. Payne is President and Chief Executive Officer, as to which
     Mr. Payne disclaims beneficial ownership.

 (9) Includes 56 shares owned jointly by Mr. Sylvester's wife, her mother and
     sister, as to which Mr. Sylvester disclaims beneficial ownership.

(10) Held in a trust as to which Mr. Entwisle is co-trustee with sole voting
     and investment power.

(11) Includes  240  shares  owned  by Mr.  Tjian's  wife as to which  Mr.  Tjian
     disclaims  beneficial  ownership  and 12,567  shares  held in a trust as to
     which Mr. Tjian is co-trustee with sole voting and investment power.

(12) Includes 1,300 shares owned by Mr. Fritz's wife as to which Mr. Fritz
     disclaims beneficial ownership.
</TABLE>

                                9

<PAGE>

   Section  16(a) of the  Securities  Exchange  Act of  1934,  as  amended  (the
"Exchange Act") requires the Corporation's  directors and executive officers and
persons who own more than 10% of a registered class of the Corporation's  equity
securities to file with the Securities and Exchange  Commission  (the "SEC") and
the National  Association of Securities Dealers initial reports of ownership and
reports of changes in ownership of Common Stock and other equity  securities  of
the  Corporation.  Officers,  directors  and greater than 10%  shareholders  are
required by the SEC to furnish the Corporation  with copies of all Section 16(a)
forms they file.

   To the  Corporation's  knowledge,  based on a review  of the  copies  of such
reports furnished to the Corporation and written  representations  that no other
reports were required,  during the fiscal year ended December 31, 1994, with the
exception of Hans T. Y. Tjian, all Section 16(a) filing requirements  applicable
to its executive officers, directors and 10% shareholders were complied with.

   On November 2, 1994, the wife of Mr. Tjian, Senior Vice President and Manager
of the Operations and Systems Administration  Division,  purchased 240 shares of
the Corporations's  Common Stock. This purchase was not reported on a Form 4 for
November 1994, but was reported on Mr. Tjian's Form 5 filed for the period ended
December 31, 1994.

                                       10

<PAGE>

                             EXECUTIVE COMPENSATION

     The following Summary Compensation Table sets forth the compensation of the
Corporation's Chief Executive Officer and the four other most highly compensated
executive  officers for services in all capacities to the  Corporation,  WAB and
other subsidiaries during 1994, 1993 and 1992:

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                              ANNUAL COMPENSATION           LONG-TERM COMPENSATION
                    -------------------------------------- -----------------------
      NAME AND                                               RESTRICTED              ALL OTHER
      PRINCIPAL                                                STOCK                 COMPENSA-
      POSITION       YEAR   SALARY     BONUS(1)   OTHER(2)   AWARDS(3)   OPTIONS(3)   TION(4)
      --------      ------ ---------- ---------- --------- ------------  ----------  ---------
<S>                 <C>    <C>        <C>        <C>       <C>           <C>         <C>
David L. Payne,     1994   $272,016   $200,000   $ 2,379   $174,038      27,050      $8,367
CEO                 1993    260,016    190,000    12,836    187,425      13,000       7,088
                    1992    260,015    240,200    14,214    162,750      11,150       5,310
James M. Barnes,    1994   $149,040   $102,400   $12,777   $ 60,775       6,450      $3,750
EVP & CFO           1993    149,040    100,600    12,508     72,275       4,650       4,497
                    1992    149,000     72,400    12,667     58,125       4,000       4,364
Robert W. Entwisle, 1994   $134,280   $ 62,600   $15,937   $ 55,250       5,850      $6,369
SVP                 1993    134,280     68,500    15,839     64,925       4,200       6,216
                    1992    134,280     60,400    16,856     52,312       3,600       2,982
Hans T. Y. Tjian,   1994   $130,008   $ 66,600   $16,230   $ 44,200       5,250      $3,750
SVP                 1993    130,008     65,700    14,714     58,800       3,800       4,497
                    1992    130,008     58,200    15,173     47,469       3,250       4,364
Charles L. Fritz,   1994   $120,960   $ 57,800   $15,004   $ 49,725       5,250      $3,750
EVP & CCO           1993    120,942     56,500    13,728     58,800       3,800       8,069
                    1992    120,744     53,700    14,523     47,469       3,250       4,364

<FN>
- ----------
(1) Includes bonuses in the year in which they were earned.

(2) Includes  monthly  auto  allowance  for each  individual,  the amount of any
    taxable  perquisites  and split dollar life insurance for Mr. Payne in 1994,
    1993 and 1992.

(3) The Corporation grants restricted  performance shares and nonqualified stock
    options in the first quarter of each year based on corporate  performance in
    the prior calendar year. These grants are reported in the year in which they
    were  granted.  At December 31, 1994 these  individuals  held the  following
    unvested  restricted  performance  shares  with the  following  fair  market
    values, based on a price of $29.50 per share: Payne (25,400 shares valued at
    $749,300); Barnes (9,550 shares valued at $281,725);  Entwisle (8,600 shares
    valued at $253,700);  Tjian (7,800  shares  valued at  $230,100);  and Fritz
    (7,800  shares  valued at  $230,100).  The  following  table  sets forth the
    restricted  performance  share grants which were made on the following dates
    to the named individuals:

                    JANUARY 20, 1992    JANUARY 27, 1993    JANUARY 26, 1994
                      MARKET PRICE:       MARKET PRICE:       MARKET PRICE:
                     $19.375/SHARE        $24.50/SHARE        $28.06/SHARE
                    ----------------    ----------------    ----------------
     Payne               8,400               7,650               9,350
     Barnes              3,000               2,950               3,600
     Entwisle            2,700               2,650               3,250
     Tjian               2,450               2,400               2,950
     Fritz               2,450               2,400               3,250

(4) Includes 1994 matching  contributions  made by the  Corporation  under the
    Westamerica Bancorporation Tax-Deferred Savings/Retirement Plan (ESOP)
    for the accounts of Messrs. Payne, Barnes, Entwisle, Tjian and Fritz of
    $3,750 each.

</TABLE>
                                       11

<PAGE>
   The following  table describes  stock options and stock  appreciation  rights
("SARs") that were granted pursuant to the Westamerica Bancorporation 1985 Stock
Option Plan (the "1985 Stock Option Plan") to the Corporation's  Chief Executive
Officer and the four other most  highly  compensated  executive  officers in the
fiscal year ended  December 31,  1994.  All of these grants were made on January
26, 1994, based on achievement of 1993 corporate performance objectives.


                     OPTION/SAR GRANTS IN LAST FISCAL YEAR

                                   PERCENT
                                   OF TOTAL                              GRANT
                     NUMBER    OPTIONS GRANTED                            DATE
                   OF OPTIONS  TO ALL EMPLOYEES  EXERCISE  EXPIRATION   PRESENT
NAME               GRANTED(1)   IN FISCAL YEAR    PRICE       DATE      VALUE(2)
                   ----------  ----------------  --------  ----------   --------
David L. Payne  .... 27,050         22%          $28.06     1-26-04     $353,003
James M. Barnes  ...  6,450         5             28.06     1-26-04       84,173
Robert W. Entwisle..  5,850         5             28.06     1-26-04       76,343
Hans T. Y. Tjian ...  5,250         4             28.06     1-26-04       68,513
Charles L. Fritz....  5,250         4             28.06     1-26-04       68,513

- ----------
(1) All options are  nonqualified  stock  options  which vest over a  three-year
    period:  1/3 one year after grant date,  2/3 two years after grant date, and
    fully three years from grant date.  All options have an exercise price equal
    to  the  market  value  on  the  date  of  grant.  The  terms  of all of the
    Corporation's stock option plans provide that options may become exercisable
    in full in the event of a change of control as defined in each stock  option
    plan.

(2) A Black-Scholes option pricing model using standard  assumptions,  including
    7.4% annual  dividend  growth,  a risk-free  rate equal to the ten-year U.S.
    Treasury yield of 5.71%,  volatility of 26% and a ten-year maturity was used
    to derive the per share option value of $13.05.

   The following  table sets forth the stock  options or SARs  exercised in 1994
and the December 31, 1994  unexercised  value of both vested  and unvested stock
options  and SARs for the  Corporation's  Chief  Executive  Officer and the four
other most highly compensated executive officers.


                 AGGREGATED OPTION AND SAR EXERCISES AND VALUE

<TABLE>
<CAPTION>
                                                 NUMBER OF UNEXERCISED         VALUE OF UNEXERCISED
                                                    OPTIONS/SARS AT          IN-THE-MONEY OPTIONS/SARS
                       SHARES                      DECEMBER 31, 1994          AT DECEMBER 31, 1994(1)
                      ACQUIRED      VALUE   ----------------------------- -----------------------------
     NAME            ON EXERCISE   REALIZED   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
     ----           ------------ ---------- ------------- --------------- ------------- ---------------
<S>                     <C>      <C>        <C>           <C>             <C>           <C>
David L. Payne .....        0    $      0   20,166        39,434          $211,374      $119,922
James M. Barnes ....    5,010     103,514   45,556        10,884           591,916        38,295
Robert W. Entwisle..    3,500      57,563   18,900         9,850           169,863        34,574
Hans T. Y. Tjian ...        0           0   13,582         8,868           149,980        31,206
Charles L. Fritz ...        0           0    5,782         8,868            60,280        31,206

<FN>
- ----------
(1) Fair market value of the Corporation's  Common Stock was $29.50 per share on
    December 31, 1994.
</TABLE>

               RETIREMENT BENEFITS AND OTHER ARRANGEMENTS

DEFINED BENEFIT RETIREMENT PLAN

     Illustrated below are the estimated annual retirement benefits,  based upon
a  single  life  annuity,  which  would  be  payable  under  the  terms  of  the
Corporation's retirement plan to employees, in the salary ranges shown, retiring
at or after age 65 in 1994.

                               12

<PAGE>
                               PENSION PLAN TABLE

                                               YEARS OF SERVICE
                                      ESTIMATED ANNUAL RETIREMENT INCOME
  VALUATION PERIOD            -------------------------------------------------
AVERAGE COMPENSATION              15        20        25        30        35
- --------------------          --------- --------- --------- --------- ---------
$ 60,000 ...................  $14,800   $19,700   $24,600   $ 29,600  $ 34,500
 100,000 ...................   25,600    34,100    42,600     51,200    59,700
 140,000 ...................   36,400    48,500    60,600     72,800    84,900
 150,000 (1994 maximum) ....   39,100    52,100    65,200     78,200    91,200
 180,000 ...................   47,200    62,900    78,600     94,400   110,100
 200,000 (pre-1994 maximum)    52,600    70,100    87,700    105,200   122,700

     The  Corporation's  retirement plan provides for minimum  pension  benefits
that are  determined  by a  participant's  years of service  credited  under the
Corporation's retirement plan, career average compensation,  taking into account
the participant's  social security wage base, and the value of the participant's
company contributions, plus earnings, in the Westamerica Bancorporation Deferred
Profit-Sharing Plan (the "Deferred  Profit-Sharing  Plan"). If the annuity value
of the  profit-sharing  account  balance  exceeds  the  pension  guarantee,  the
participant  will receive benefits from the Deferred  Profit-Sharing  Plan only.
Compensation  includes regular earnings and bonuses.  However,  maximum eligible
compensation  for 1994 is $150,000 in accordance with section  401(a)(17) of the
Internal Revenue Code of 1986, as amended (the "IRC"). This amount is subject to
cost of living adjustments in accordance with section 415(d) of the IRC.

     Messrs. Payne, Barnes, Entwisle, Tjian and Fritz have five, nine, fourteen,
five and six years, respectively, of credited service.

CERTAIN EMPLOYMENT CONTRACTS

     WAB entered into an employment  agreement with Mr. Barnes, dated January 7,
1987.  WAB also entered into an employment  agreement  with Mr.  Entwisle  dated
January 7, 1987. The agreements of these  individuals are essentially  identical
except for salary and term.  Mr.  Barnes' annual base salary is $149,040 and Mr.
Entwisle's is $134,280.  The  agreements  are  "evergreen" in the sense that the
term of the agreement is  automatically  extended for one additional  month upon
completion of each additional month of employment unless WAB gives Mr. Barnes or
Mr. Entwisle one or two years', respectively, notice of intent to terminate.

     WAB may terminate each of these  executive's  employment  without cause and
each of these  executives  may terminate his  employment  for "good  reason," as
defined in the agreements. Under such circumstances, however, Messrs. Barnes and
Entwisle each would be entitled to severance pay equal to the sum of: (i) two or
one,  respectively,  times his base salary;  (ii) his maximum  bonus(es)  had he
remained  employed two or one,  respectively,  additional years past the date of
termination;  and (iii) an amount equal to his automobile  allowance for the two
or one, respectively, years preceding the date of termination.

     The  agreements  with  Messrs.  Barnes and  Entwisle  also  provide for the
payment to the executive of liquidated damages upon termination of employment by
WAB without cause or  termination  by the executive for "good reason." Under the
terms of the  agreements,  the  amount of  liquidated  damages is reduced by any
severance  pay received by the  executive  and the  executive is under a duty to
mitigate his damages.

     Hans T. Y. Tjian  accepted a position with WAB as Senior Vice President and
Manager of Operations and Systems  Administration under the terms set forth in a
letter  agreement dated April 14, 1989.  Under the terms of this agreement,  Mr.
Tjian is entitled to: (i) receive an annual  salary of $130,000;  (ii) receive a
car allowance of $1,000 per month;  (iii)  participate in WAB's  executive bonus
plan; (iv) participate in the 1985 Stock Option Plan; and (v) vacation leave. In
addition,  Mr.  Tjian is entitled to receive  severance  pay equal to his annual
base salary for one year if his position is  eliminated  as a result of a change
of control.

                                       13

<PAGE>
                      BOARD COMPENSATION COMMITTEE REPORT

     The  Board,  operating  through  its  Employee  Benefits  and  Compensation
Committee,  has  established  an executive  compensation  program and determines
annual  compensation  for  executives  based  on  performance.   This  executive
compensation  program and annual  evaluation  process  establishes a competitive
base  salary for each  executive  and offers  incentive  compensation  which can
provide  additional   compensation  if  established   performance  measures  are
achieved.  This additional  compensation can be in the form of short-term annual
cash  bonuses,  long-term  stock options  and long-term  restricted  performance
shares.

     As described in the Summary  Compensation Table above, each named executive
receives a monthly base salary, and is eligible to receive an annual cash bonus,
an annual grant of stock options and an annual grant of  restricted  performance
shares.  Corporate  performance  measures are established each year based on the
Corporation's  objectives.  The extent to which these  objectives  are  achieved
determines if and what size the annual option grants and restricted  performance
share grants will be.  Achievement  of these annual  performance  measures  also
determines between 55% and 80% of the annual cash bonus to be paid to each named
executive,  with the remaining 20% to 45%  determined by individual and division
performance.

     Corporate performance measures for 1993, which determined January 1994 cash
bonuses, option grants and restricted performance share grants were to:


     *  successfully merge Napa Valley Bancorp into the Corporation;
     *  reach target  levels of return on equity,  return on assets and earnings
        per share;
     *  maintain credit quality measures at established levels;
     *  hold   noninterest   expenses  below  a  specified  level  and  maintain
        satisfactory audit results; and
     *  increase low cost deposits and commercial loan commitments.

     Corporate performance measures for 1994, which determined January 1995 cash
bonuses, option grants and restricted performance share grants were to:

     *  reach target  levels of return on equity,  return on assets and earnings
        per share;
     *  maintain credit quality measures at established levels;
     *  hold   noninterest   expenses  below  a  specified  level  and  maintain
        satisfactory audit results; and
     *  increase low cost deposits and loan volumes.

     Additional  corporate  performance  objectives for a three-year  period are
established  by the Employee  Benefits and  Compensation  Committee to accompany
each grant of  restricted  performance  shares.  Whether  each grant vests three
years following the grant is determined by achievement of these  preestablished,
three-year performance objectives.

     The  Chief  Executive  Officer's  base  salary  in  1994  of  $272,016  was
established at a level judged to be  competitive  with  comparable  positions at
other financial institutions.  The Chief Executive Officer's $200,000 cash bonus
earned in 1994  (included in the Summary  Compensation  Table listed  above) and
paid in  January  of  1995,  was  related  80% to the  achievement  of the  1994
corporate  goals listed above and 20% to  achievement  of individual  management
goals.  Individual  management  goals  achieved  in 1994  included  satisfactory
results  from  regulatory  examinations,   satisfactory  internal  controls  and
satisfactory progress on acquisitions. Compared to the 1994 corporate objectives
listed above, the Corporation:

     *  exceeded its targeted profitability objectives;
     *  improved credit quality measures to better than established levels;
     *  outperformed noninterest expense and control goals; and
     *  fell short of low cost deposit growth goals and commercial loan goals.

                                       14

<PAGE>
     The Chief Executive  Officer's  receipt,  pursuant to the 1985 Stock Option
Plan,  of 27,050  nonqualified  stock options and 9,350  restricted  performance
shares  in  January  1994 was  related  to  achievement  of the  1993  corporate
performance  measures  listed above.  Compared to the 1993 corporate  objectives
listed above, the Corporation:

     *  exceeded its Napa Valley Bancorp merger objectives;
     *  exceeded its targeted profitability goals;
     *  improved credit quality measures to better than established levels;
     *  met noninterest expense control goals; and
     *  exceeded  low  cost  deposit  growth  goals  and  met  commercial   loan
        commitment goals.

     A description of the Westamerica  Bancorporation  Stock Option Plan of 1995
(the "1995 Stock Option  Plan") is set forth in Proposal  Number 3 below.  Under
the 1995 Stock Option  Plan,  if approved by holders of a majority of the shares
represented  and voting at the  Meeting,  the  Corporation  will be permitted to
issue awards in the form of restricted  performance shares, stock options, SAR's
or any combination  thereof, to eligible employees including but not limited to,
the executive officers,  for the same reasons as the 1985 Stock Option Plan. The
1985 Stock Option Plan will expire on December 18, 1995,  but will be terminated
and the shares reserved thereunder  canceled,  on the effective date of the 1995
Stock Option Plan.  The 1995 Stock  Option Plan,  if approved,  will replace the
1985 Stock Option Plan on a prospective  basis. No awards have been made to date
under the 1995 Stock Option  Plan.  Since each award under the 1995 Stock Option
Plan increases if the price of the Corporation's  stock increases,  the Employee
Benefits and  Compensation  Committee  believes  that the 1995 Stock Option Plan
provides strong incentive to achieve excellent results and that all shareholders
should therefore benefit from the program.

Other

     In 1993, the IRC was amended to add section 162(m). Section 162(m) places a
limit of  $1,000,000 on the amount of  compensation  that may be deducted by the
Corporation  in any year with  respect to certain of the  Corporation's  highest
paid executives.  The Corporation intends generally to qualify compensation paid
to executive  officers for  deductibility  under the IRC,  including new section
162(m).  The  Corporation  is submitting for a vote of the  shareholders  at the
Meeting the 1995 Stock Option Plan to maximize the tax  deductibility  of awards
under such 1995 Stock Option Plan.  However,  the  Corporation  may from time to
time in the future pay  compensation  to its executive  officers that may not be
deductible.

     The  Employee  Benefits  and  Compensation   Committee  believes  that  the
foregoing  compensation  programs and  policies  provide  competitive  levels of
compensation,  encourage long-term  performance and promote management retention
while  further  aligning   shareholders'  and  managements'   interests  in  the
performance of the Corporation and the Corporation's Common Stock.

     Members of the Employee  Benefits and Compensation  Committee as of January
25, 1995 are: Patrick D. Lynch,  Chairman,  Etta Allen,  Don Emerson,  Arthur C.
Latno, Jr., Catherine Cope MacMillan and Ronald A. Nelson.

                                       15

<PAGE>
[The following descriptive data is supplied in accordance with Rule 304(d) of
Regulation S-T]


                           STOCK PERFORMANCE CHART(1)

Year        Westamerica           Western Bank            S&P 500
Ended     Bancorporation    Monitor Industry Proxy(2)      Index
- -----     --------------    -------------------------     --------
1989         100                    100                     100
1990          70                     89                      93
1991          90                     95                     118
1992         109                    115                     123
1993         128                    133                     132
1994         143                    135                     130

(1) Assumes  $100  invested on December  31,  1989 in the  Corporation's  Common
    Stock, the S&P 500 composite stock index and Montgomery Securities' index of
    41 Western bank stocks, with reinvestment of dividends.
(2) Source:  Montgomery Securities' Western  Bank  Monitor--Western Bank Monitor
    Industry Proxy.

        APPROVAL OF AMENDMENT OF THE RESTATED ARTICLES OF INCORPORATION

     On February 27, 1995,  the Board adopted an amendment of the  Corporation's
Restated  Articles of  Incorporation  (the  "Articles")  which will increase the
number of authorized  shares of Common Stock from  20,000,000 to 50,000,000.  In
order to be effective, the amendment of the Articles must be approved by holders
of a majority of the outstanding Shares of Common Stock of the Corporation.  The
text of Article III of the Articles is to read as follows:

          Capitalization.  This corporation is authorized to issue three classes
     of shares designated "Common Stock",  "Class B Common Stock" and "Preferred
     Stock", respectively. The number of shares of Common Stock authorized to be
     issued  is  50,000,000,  the  number  of  shares  of Class B  Common  Stock
     authorized  to be issued is 1,000,000 and the number of shares of Preferred
     Stock authorized to be issued is 1,000,000. The Preferred Stock and Class B
     Common  Stock may be issued  from time to time in one or more  series.  The
     Board of Directors is  authorized to fix the number of shares of any series
     of  Preferred  Stock  and  Class  B  Common  Stock  and  to  determine  the
     designation of any such series.  The Board of Directors is also  authorized
     to determine or alter the rights, preferences, privileges, and restrictions
     granted to or imposed upon any wholly unissued class or series of Preferred
     Stock or Class B Common  Stock,  and,  within the  limits and  restrictions
     stated  in  any  resolution  or  resolutions  of  the  Board  of  Directors
     originally fixing the number of shares constituting any series, to increase
     or  decrease  (but not below the  number  of  shares  of such  series  then
     outstanding)  the  number of shares of any such  series  subsequent  to the
     issue of shares of that series.


                                       16

<PAGE>
     The Board  believes  that the  number of shares  currently  authorized  for
issuance  does not  provide the  Corporation  with the  flexibility  required to
pursue  the  Corporation's   long  term  goals,   such  as  pursuing   expansion
opportunities  which may arise from time to time and  require  the  issuance  of
additional shares of Common Stock. Accordingly,  the Board believes it is in the
best interest of the Corporation and its shareholders to approve an amendment of
the Articles to increase the number of authorized shares of Common Stock.

     If the  shareholders  do not approve this proposal,  the  Corporation  will
attempt to repurchase  shares  sufficient to meet its long-term goals.  However,
there  can be no  assurance  that  the  Corporation  will be  able  to  purchase
sufficient shares to meet such goals.

     THE BOARD  RECOMMENDS  A VOTE FOR  AMENDMENT  OF THE  RESTATED  ARTICLES OF
INCORPORATION TO INCREASE THE NUMBER OF SHARES OF AUTHORIZED COMMON STOCK.


            APPROVAL OF THE CORPORATION'S STOCK OPTION PLAN OF 1995

STOCK OPTION PLAN OF 1995

     Adoption.  The  Corporation's  Stock  Option  Plan of 1995 (the "1995 Stock
Option  Plan")  was  adopted by the Board on January  26,  1995,  subject to the
approval of the  Corporation's  shareholders  on April 25, 1995.  The 1995 Stock
Option Plan is attached to this proxy statement as Exhibit A.

     Shares  Available  for  Issuance.  The 1995 Stock Option Plan  provides for
awards in the form of restricted  performance shares, stock options, SARs or any
combination  thereof.  To date,  no awards  have been made  under the 1995 Stock
Option  Plan.  Upon  approval of the 1995 Stock  Option  Plan,  there will be no
shares available for issuance under the 1985 Stock Option Plan since such shares
will have been  canceled.  On January 1, 1995 and each January 1 thereafter  for
the remaining term of the 1995 Stock Option Plan, 2% of the Corporation's issued
and outstanding  shares of Common Stock on January 1 of each calendar year shall
be reserved for awards;  provided,  however,  that any reserved shares that have
been reserved for award but not issued under such awards shall remain  available
for award in any  subsequent  calendar  year.  In  addition,  if any  restricted
performance shares, options or SARs granted under the 1995 Stock Option Plan are
forfeited,  or if  options  or SARs  terminate  for any  other  reason  prior to
exercise,  then the  underlying  shares  of  Common  Stock  shall  again  become
available  for  awards.  If SARs are  exercised  for cash,  the number of shares
underlying   such  awards   shall   become   available   for   further   awards.
Notwithstanding the foregoing, no more than 400,000 shares of Common Stock shall
be available for the grant of incentive stock options  ("ISOs") over the term of
the 1995 Stock Option Plan.

     Administration and Eligibility.  The 1995 Stock Option Plan is administered
by a  committee  of the  Board  consisting  of at  least  two  members  who  are
"disinterested"  as such term is defined  under Rule 16b-3 of the  Exchange  Act
(the "Committee"). The Committee selects the employees of the Corporation or any
subsidiary  who  will  receive  awards,  determines  the size of the  award  and
establishes  the vesting or other  conditions.  All employees of the Corporation
(or any subsidiary of the  Corporation)  are eligible to participate in the 1995
Stock  Option  Plan.  As of January 1,  1995,  37  employees  were  eligible  to
participate in the 1995 Stock Option Plan.

     Payment. In general, no payment will be required upon receipt of an award.

     Restricted  Performance  Shares.  A  restricted  performance  share  is  an
unfunded  bookkeeping  entry  representing the equivalent of one share of Common
Stock,  and it is  nontransferable  prior to the  holder's  death.  A holder  of
restricted  performance  shares has no voting  rights or other  privileges  as a
shareholder.

     Restricted performance shares, when vested, will be settled by distributing
shares of Common  Stock.  The number of shares of Common  Stock  distributed  in
settlement  of restricted  performance  shares may be smaller than the number of
restricted  performance  shares  granted,   depending  upon  the  attainment  of
performance objectives.  Vested restricted performance shares will be settled at
the time determined by the Committee.

                                       17

<PAGE>

     Stock Options.  Options may include  nonstatutory stock options ("NSOs") as
well as ISOs intended to qualify for special tax treatment. No optionee shall be
granted  options  during  any  calendar  year  in  excess  of  1% of  the  total
outstanding  shares of the Common Stock of the  Corporation  on January 1, 1995.
The term of an option  cannot  exceed ten years,  and the  exercise  price of an
option  must be equal to or  greater  than the fair  market  value of the Common
Stock on the date of grant.

     The exercise price of an option may be paid in any lawful form permitted by
the Committee,  including (without limitation) the surrender of shares of Common
Stock already owned by the optionee.  The 1995 Stock Option Plan also allows the
optionee  to pay the  exercise  price of an  option  by  giving  "exercise/sale"
directions.  If  exercise/sale  directions  are given, a number of option shares
sufficient  to pay the  exercise  price  and any  withholding  taxes  is  issued
directly to a securities  broker selected by the Corporation who, in turn, sells
these  shares in the open  market.  The  broker  remits to the  Corporation  the
proceeds from the sale of these shares,  and the optionee receives the remaining
option shares or cash.  The  Committee may also permit  optionees to satisfy the
exercise price of an option  (including any applicable  taxes) by surrendering a
portion of their option shares to the Corporation.

     Stock  Appreciation  Rights.  An SAR  permits the  participant  to elect to
receive  any  appreciation  in  the  value  of the  underlying  stock  from  the
Corporation  in cash. No optionee shall be granted SARs during any calendar year
in excess  of 1% of the total  outstanding  shares  of the  Common  Stock of the
Corporation  on January 1, 1995.  The amount  payable on  exercise  of an SAR is
measured by the difference  between the market value of the underlying  stock at
exercise and the exercise price.

     Vesting Conditions.  As noted above, the Committee determines the number of
restricted performance shares, stock options or SARs to be included in the award
as well as the vesting and other conditions. The vesting conditions may be based
on the employee's service, his or her individual performance,  the Corporation's
performance or other  criteria.  It is anticipated  that the vesting  conditions
generally  will be based on the  employee's  service  after  the date of  grant.
Vesting may be accelerated in the event of the employee's  death,  disability or
retirement  and will be  accelerated  in the event of a change in  control  with
respect to the Corporation.

     For purposes of the 1995 Stock Option Plan, the term "change in control" is
defined as (i) a dissolution or liquidation of the  Corporation,  (ii) a sale of
all or substantially all of the  Corporation's  assets, or (iii) a tender within
the  meaning  of  section  14 of the  Exchange  Act  made  for 5% or more of the
Corporation's  stock by any  person  other  than the  Corporation  or any of its
subsidiaries.

     Modifications.  The Committee is  authorized,  within the provisions of the
1995 Stock Option Plan, to amend the terms of outstanding restricted performance
shares to  modify  or extend  outstanding  options  or SARs or to  exchange  new
options for outstanding  options,  including  outstanding  options with a higher
exercise price than the new options.


FEDERAL INCOME TAX CONSEQUENCES

     The following discussion of the federal income tax consequences of the ISOs
and NSOs  under the 1995  Stock  Option  Plan is  intended  to be a  summary  of
applicable federal law. State and local tax consequences may differ. Because the
federal income tax rules governing  options and related payments are complex and
subject to frequent change,  optionees are advised to consult their tax advisors
prior to  exercise  of options or  dispositions  of stock  acquired  pursuant to
option exercise.

     ISOs and NSOs are treated differently for federal income tax purposes. ISOs
are  intended to comply with the  requirements  of section 422 of the IRC.  NSOs
need not comply with such requirements.

     An optionee is not taxed on the grant or exercise of an ISO. The difference
between  the  exercise  price  and the fair  market  value of the  shares on the
exercise  date  will,  however,  be  a  preference  item  for  purposes  of  the
alternative  minimum tax. If an optionee holds the shares acquired upon exercise
of an ISO for at least two years following grant and at least one year following
exercise,  the  optionee's  gain, if any, upon a subsequent  disposition of such
shares is  long-term  capital  gain.  The measure of the gain is the  difference
between the proceeds  received on disposition  and the  optionee's  basis in the
shares (which generally equals the exercise price).  If an optionee  disposes of
stock acquired  pursuant to exercise of an ISO before satisfying the one and two

                                       18
<PAGE>

year holding periods  described above, the optionee will recognize both ordinary
income and capital gain in the year of  disposition.  The amount of the ordinary
income  will be the lesser of (i) the amount  realized on  disposition  less the
optionee's  adjusted  basis in the stock  (usually the option price) or (ii) the
difference  between the fair market value of the stock on the exercise  date and
the  option  price.  The  balance  of  the  consideration  received  on  such  a
disposition  will be  long-term  capital  gain if the stock had been held for at
least one year following exercise of the ISO. The Corporation is not entitled to
an income tax deduction on the grant or exercise of an ISO or on the  optionee's
disposition  of the shares  after  satisfying  the  holding  period  requirement
described above. If the holding periods are not satisfied,  the Corporation will
be entitled to a deduction in the year the optionee  disposes of the shares,  in
an amount equal to the ordinary income recognized by the optionee.

     An optionee is not taxed on the grant of a  NSO. On exercise,  however, the
optionee  recognizes  ordinary income equal to the difference between the option
price  and the fair  market  value of the  shares on the date of  exercise.  The
Corporation  is entitled to an income tax  deduction  in the year of exercise in
the amount recognized by the optionee as ordinary income. Any gain on subsequent
disposition  of the shares is long-term  capital gain if the shares are held for
at least  one year  following  exercise.  The  Corporation  does not  receive  a
deduction for this gain.


NEW 1995 STOCK OPTION PLAN BENEFITS

     The  Committee  has full  discretion  to determine the number and amount of
options to be granted to employees under the 1995 Stock Option Plan.  Therefore,
the benefits and amounts that will be received by the Chief Executive Office and
the four  other  most  highly  compensated  executive  officers,  the  executive
officers as a group and all other  employees  are not  determinable.  Details on
stock options granted during the last three years to the Chief Executive Officer
and the four other most highly  compensated  executive officers are presented in
the table entitled "Summary Compensation Table."

REQUIRED APPROVAL

     The  affirmative  vote of the holders of a majority of the shares of Common
Stock  represented  and voting at the  Meeting is  required  to approve the 1995
Stock Option Plan.  Properly  executed proxies received by the Corporation which
have not  indicated  any vote on the 1995 Stock  Option Plan will be voted "FOR"
approval of the 1995 Stock Option Plan.

     THE  BOARD  RECOMMENDS  A VOTE  FOR THE APPROVAL OF THE 1995 STOCK OPTION 
PLAN.

                              APPROVAL OF AUDITORS

     The Board has selected KPMG Peat Marwick LLP as independent auditor for the
Corporation  for  the  1995  fiscal  year,   subject  to  the  approval  of  the
shareholders. KPMG Peat Marwick LLP has informed the Corporation that it has had
no  connection  during  the  past  three  years  with  the  Corporation  or  its
subsidiaries in the capacity of promoter, underwriter, voting trustee, director,
officer or employee.

     Representatives  of KPMG Peat  Marwick  LLP will be present at the  Meeting
with the  opportunity to make a statement if they desire to do so and to respond
to appropriate questions.

     THE BOARD  RECOMMENDS  A VOTE FOR THE  APPROVAL OF KPMG PEAT MARWICK LLP AS
INDEPENDENT AUDITOR FOR THE CORPORATION FOR THE 1995 FISCAL YEAR.

                                       19

<PAGE>
                              SHAREHOLDER PROPOSAL

     SHAREHOLDER'S  PROPOSAL TO CHANGE METHOD OF  COMPENSATING  THE DIRECTORS OF
THE CORPORATION

     The  Corporation  has been advised that a shareholder  intends to present a
proposal at the Meeting.  The name and address of the shareholder and the number
of shares of the  Corporation's  Common Stock owned by such  individual  will be
furnished by the  Corporation  to any person,  either  orally or in writing,  as
requested,  promptly upon either the oral or written request therefor.  Requests
should be directed to the Corporations's  Assistant  Corporate  Secretary,  Mary
Anne Bell. The proposal and supporting  statement  submitted by the  shareholder
are quoted below. The Board opposes the proposal for the reasons stated below.

SHAREHOLDER PROPOSAL

     The shareholders of WestAmerica  Corporation request the Board of Directors
take the necessary steps to amend the company's  governing  instruments to adopt
the following:  

     Beginning on the 1996  WestAmerica  Corporation  fiscal year all members of
the Board of Director's  total  compensation  will be 1000 shares of WestAmerica
Corporation  common stock each year. No other  compensation  of any kind will be
paid.

SHAREHOLDER'S SUPPORTING STATEMENT

     For many years the [*] Family have been submitting for shareholder vote, at
this  corporation  as well as other  corporations,  proposals  aimed at  putting
management on the same playing field as the shareholders. This proposal would do
just that. 

     A few  corporations  have seen the  wisdom in  paying  directors  solely in
stock. Most notably, Scott Paper and Travelers.  Ownership in the company is the
American  way.  We feel that this method of  compensation  should be welcomed by
anyone who feels they have the ability to direct a major corporation's fortunes.

     The directors would receive 1000 shares each year. If the corporation  does
well,  the directors will make more money in the value of the stock they receive
and the dividend  that usually rise with more  profits.  If things go bad,  they
will be much more inclined to correct things, because it will be coming directly
out of their pockets. Instead of the way it is done now, where directors receive
the same compensation for good or bad performance.

BOARD OF DIRECTORS' STATEMENT IN OPPOSITION TO SHAREHOLDER PROPOSAL

     The Board recommends that the shareholders vote against this proposal.

     The Board agrees that the  shareholders of the Corporation  deserve a Board
which is  "accountable"  to the Corporation and its  shareholders and that share
ownership  is a relevant  factor in  considering  a  director's  qualifications.
However, the Board believes that the Corporation's  current compensation package
for its directors  encourages and mandates the type of "accountability" that the
shareholder desires and is supported by well settled legal standards  concerning
the duties of directors.

     The Corporation's directors include men and women who are leaders in a wide
range of business fields.  The experience and varied  perspectives they bring to
the Board's  deliberations  are  critical in making  informed,  reasoned  policy
decisions on the diverse and complex  issues with which the Board must deal.  In
order for the Corporation to attract and retain highly qualified  individuals to
serve on the Board, the Corporation  must provide  compensation to its directors
competitive with that which is provided by other public companies.

     In  California,  the  majority  of  public  corporations  compensate  their
directors with cash payments as well as other benefits. During 1994, each of the
directors  of the  Corporation  received  an  annual  retainer  of  $14,000.  In
addition,  each director  received $1,000 for every meeting of the Board that he
     
- ----------
*  The  name of the  individual  will be  furnished  by the  Corporation  to any
   person,  either orally or in writing, as requested,  promptly upon either the
   oral or written request therefor.

                               20


<PAGE>
or she attended.  Nonemployee directors received $500 for each committee meeting
attended and the chairman of each committee received an additional $250 for each
committee  meeting  attended.  As  Chairman  of the  Board,  David  L.  Payne is
compensated  as an  employee  and does not  receive  any  annual  retainer  or a
director's fee for attending  Board or committee  meetings.  The average outside
director  spends  12-20 hours per month on  Corporation  matters (the hours vary
because  directors who are members of more than one committee  spend more time),
and travels 12 times  (meetings  are  monthly)  per year to Board and  committee
meetings (the Board and the various committee meetings take place over a two-day
period).  Since the time a director spends on Corporation  matters and travel is
time away from that director's principal occupation or business, the Corporation
compensates its directors in cash payments just as a shareholder would expect to
be compensated for services which he or she provides to a business employing him
or her.

     The  supporting  statement  to the  shareholder's  proposal  states that by
compensating  the  directors  with  Common  Stock,  the  directors  will be more
"accountable" to the Corporation. This sentiment presupposes that the director's
existing  interest in the  Corporation  is limited to the receiving of an annual
retainer and a director's  fee for attending  Board and committee  meetings.  In
fact,  the  members of the Board have a  significant  ownership  interest in the
Corporation.  The directors of the  Corporation,  as of February 1, 1995,  owned
131,287 shares or 1.42% of the  outstanding  shares of the  Corporation  on that
date.  The Corporation currently requires that each director own at least $1,000
worth of the Corporation's stock.  The Board believes that an individual's level
of  share  ownership  is  not  necessarily  the  best  indicator of judgment and
commitment to the Corporation.

     THE  BOARD  THEREFORE  RECOMMENDS  A VOTE  AGAINST  THE  ABOVE  SHAREHOLDER
PROPOSAL.

                                 OTHER MATTERS

     Management of the Corporation  does not know of any matters to be presented
at the Meeting other than those  specifically  referred to herein.  If any other
matters should properly come before the Meeting or any adjournment  thereof, the
persons named in the enclosed  proxy intend to vote thereon in  accordance  with
their best business judgment.

     For a matter to be properly  brought  before the Meeting by a  shareholder,
section 2.02 of the  Corporation's  Bylaws  ("Section  2.02")  provides that the
shareholder must deliver or mail a written notice to the Secretary (or Assistant
Secretary) of the  Corporation not less than 14 days nor more than 50 days prior
to the Meeting.  Section 2.02 also provides that the notice must set forth as to
each matter that the  shareholder  proposes to bring  before the Meeting a brief
description  of the  business  desired to be brought  before the Meeting and the
reasons for  conducting  such  business at the Meeting,  the name and  residence
address of the  shareholder  proposing such business,  the number of shares that
are owned by the  shareholder  and any material  interest of the  shareholder in
such business.

     The  cost  of  the  solicitation  of  proxies  in  the  accompanying  form,
including,  but not limited to, the cost of a proxy  solicitation  firm, will be
borne by the Corporation. The Corporation has retained the services of Corporate
Investor Communications, Inc. to assist in the solicitation of proxies at a cost
not to exceed $5,500 plus  reasonable  out-of-pocket  expenses.  The Corporation
will reimburse  banks,  brokers and others holding stock in their names or names
of nominees or  otherwise  for  reasonable  out-of-pocket  expenses  incurred in
sending proxies and proxy materials to the beneficial owners of such stock.

                                             BY ORDER OF THE BOARD OF 
                                              DIRECTORS

                                             
                                             ----------------------------------
                                             Mary Anne Bell
                                             Assistant Corporate Secretary

Dated: March 21, 1995


                                       21
<PAGE>
                                                                       EXHIBIT A
                          WESTAMERICA BANCORPORATION
                          STOCK OPTION PLAN OF 1995
                         (AS ADOPTED APRIL 25, 1995)



<PAGE>
                              TABLE OF CONTENTS

                                                                    PAGE
                                                                  --------

I.         DEFINITIONS ..........................................     1
            1. "Award" ..........................................     1
            2. "Board" ..........................................     1
            3. "Code" ...........................................     1
            4       "Committee" .................................     1
            5. "Common Stock" ...................................     1
            6. "Corporation" ....................................     1
            7. "Employee" .......................................     1    
            8. "Fair Market Value" ..............................     1
            9. "Grant" ..........................................     1
           10. "ISO" ............................................     1
           11. "NQSO" ...........................................     1
           12. "Option Agreement" ...............................     1
           13. "Option" .........................................     1
           14. "Optionee" .......................................     1
           15. "Plan" ...........................................     1
           16. "SAR" ............................................     1
           17. "Subsidiary" .....................................     1
           18. "Westamerica Bancorporation" .....................     1
II.        PURPOSE ..............................................     1
III.       SHARES SUBJECT TO THE PLAN ...........................     2    
IV.        ADMINISTRATION OF THE PLAN ...........................     2
           1. Committee Procedures ..............................     2
           2. Committee Responsibilities ........................     2
           3. Modification, Extension and Renewal of Awards  ....     3
           4. Limitations on SARs and Options ...................     3
IVA.       STOCK APPRECIATION RIGHTS ............................     3
V.         ELIGIBLE EMPLOYEES ...................................     3
VI.        OPTION EXERCISE PRICE ................................     3
VII.       PAYMENT OF OPTION EXERCISE PRICE .....................     4
VIII.      TERMS AND EXERCISE OF OPTIONS ........................     4    
IX.        TERMINATION OF EMPLOYMENT ............................     4
X.         NON-TRANSFERABILITY ..................................     4
XI.        RESTRICTED PERFORMANCE SHARE GRANTS ..................     5
XII.       ADJUSTMENTS UPON CHANGES IN STOCK ....................     5
XIII.      RIGHTS AS AN OPTIONEE, STOCKHOLDER, OR EMPLOYEE  .....     5
XIV.       OTHER PROVISIONS .....................................     6
XV.        REGISTRATION AND RESALE ..............................     6
XVI.       EFFECTIVE DATE, TERM AND SHAREHOLDER APPROVAL  .......     6
XVII.      AMENDMENT OF PLAN ....................................     6
XVIII.     TAXES ................................................     6

                                i

<PAGE>

                           WESTAMERICA BANCORPORATION
                           STOCK OPTION PLAN OF 1995

                                 I. DEFINITIONS

As used herein, the following terms have the following meanings:

     1. "Award" means an Option, a SAR or a Grant.

     2. "Board" means the Board of Directors of the Corporation.

     3. "Code" means the Internal Revenue Code of 1986, as amended.

     4. "Committee" means the Committee described in Article IV hereof.

     5. "Common Stock" means the Common Stock of the Corporation.

     6.   "Corporation"   means   Westamerica   Bancorporation,   a   California
corporation.

     7.  "Employee"  means any  officer  or  salaried  employee  of  Westamerica
Bancorporation.

     8. "Fair  Market  Value"  shall mean (i) the mean of the highest and lowest
selling  price of a share of Common Stock on the  principal  exchange  which the
shares are trading,  on the first trading day immediately  preceding the date on
which the Fair Market Value is determined,  or (ii) if the shares are not traded
on an  exchange  but are quoted on the  National  Market  System or a  successor
quotation system,  the mean of the highest and lowest selling price on the first
trading day  immediately  preceding  the date on which the Fair Market  Value is
determined,  or (iii) if the shares are not traded on an  exchange  or quoted on
the National  Market  System or a successor  quotation  system,  the fair market
value  of  a  share,  as  determined  by  the  Committee  in  good  faith.  Such
determination shall be conclusive and binding on all persons.

     9. "Grant" means a restricted  performance  share grant awarded pursuant to
Article XI.

     10. "ISO" means a stock option that is intended to meet the requirements of
section 422 of the Code and is  designated  an Incentive  Stock Option or ISO by
the Committee.

     11. "NQSO" means an option that is not an ISO.

     12. "Option  Agreement"  means a written option  agreement duly executed on
behalf of the  Corporation,  delivered  to an  Optionee,  and  executed  by such
Optionee in accordance with Article XIII hereof.

     13.  "Option"  means  either an ISO or an NQSO  granted  under the Plan and
entitling the holder to purchase share(s) of Common Stock.

     14. "Optionee" means an Employee who has been granted an Option.

     15. "Plan" means the Westamerica  Bancorporation Stock Option Plan of 1995,
as set forth herein.

     16. "SAR" means a stock appreciation right granted pursuant to Article IVA.

     17. "Subsidiary" shall mean any corporation,  if the Corporation and/or one
or more other  Subsidiaries  own not less than 50 percent of the total  combined
voting  power  of all  classes  of  outstanding  stock  of such  corporation.  A
corporation that attains the status of a Subsidiary on a date after the adoption
of the Plan shall be considered a Subsidiary commencing as of such date.

     18.  "Westamerica  Bancorporation"  means the Corporation or any present or
future Subsidiary.

                                  II. PURPOSE

     It is the purpose of the Plan to provide a means  whereby  those  Employees
who have  responsibilities  for the successful  administration and management of
Westamerica  Bancorporation and whose present and potential contributions to the
success of Westamerica  Bancorporation  are of importance to the Corporation can
acquire a proprietary interest in the Corporation thereby providing an incentive
for continuing beneficial services to the Corporation.

                                      A-1

<PAGE>
                        III. SHARES SUBJECT TO THE PLAN

     1. The  aggregate  number of shares which may be issued under Awards during
any  calendar  year shall be that number which is equal to 2.0% of the number of
issued and outstanding shares of Common Stock of the Corporation as of January 1
of such  year  (January  1,  1995 in the case of the  first  year),  subject  to
adjustment  as  provided  for in Article  XII below.  Any shares  that have been
reserved  but not issued  under  Awards  during any  calendar  year shall remain
available for grant during any  subsequent  calendar year.  Notwithstanding  the
foregoing,  no more than 400,000  shares of Common Stock shall be available  for
the grant of ISOs over the term of the Plan.

     2. For the purposes of computing the total number of shares of Common Stock
available for Awards under the Plan,  there shall be counted  against the annual
limitation  shares of Common Stock subject to Awards.  If any Award expires,  is
canceled,  forfeited or terminates for any reason before being  exercised,  then
the shares of Common Stock  subject to such Award shall again  become  available
for future Awards under the Plan.  In addition,  when SARs are  surrendered  for
cash,  the shares of Common Stock  subject to such SARs shall be restored to the
share pool available for future Awards.

                         IV. ADMINISTRATION OF THE PLAN

     1. Committee Procedures. The Committee shall be designated by the Board and
shall have such membership  composition  which enables the Plan to qualify under
Rule 16b-3 issued under the Securities Exchange Act of 1934 (the "Exchange Act")
with  regard to the grant of Awards to persons  who are subject to Section 16 of
the Exchange Act. The Committee may hold meetings at such times and places as it
shall  determine.  The acts of a majority of the  Committee  members  present at
meetings at which a quorum exists,  or acts reduced to or approved in writing by
all Committee members, shall be valid acts of the Committee.

     2. Committee  Responsibilities.  Subject to the provisions of the Plan, the
Committee  shall  have  full  authority  and  discretion  to take the  following
actions:

     (a) To interpret the Plan and to apply its provisions;

     (b) To adopt, amend or rescind rules,  procedures and forms relating to the
Plan;

     (c) To authorize any person to execute,  on behalf of the Corporation,  any
instrument required to carry out the purposes of the Plan;

     (d) To determine when Awards are to be granted under the Plan;

     (e) To select the recipients of Awards;

     (f) To determine the number of shares to be subject to each Award;

     (g) To prescribe the terms and conditions of each Award, including (without
limitation) the exercise price,  the vesting or duration of the Award (including
accelerating the vesting of the Award),  to determine whether an Option is to be
classified  as an ISO or  NQSO,  and to  specify  the  provisions  of the  Award
Agreement relating to such Award;

     (h) To amend any outstanding  Award Agreement,  subject to applicable legal
restrictions and to the consent of the Employee who entered into such agreement;

     (i) To prescribe  the  consideration  for the grant of each Award under the
Plan and to determine the sufficiency of such consideration;

     (j) To determine the  disposition of each Award under the Plan in the event
of an Employee's divorce or dissolution of marriage;

     (k) To  determine  whether  Options or other  Awards under the Plan will be
granted in replacement of other grants under an incentive or other  compensation
plan of an acquired business;

     (l)  To  correct  any  defect,   supply  any  omission,  or  reconcile  any
inconsistency in the Plan, or any Option or Award Agreement; and

                                      A-2

<PAGE>
     (m) To take  any  other  actions  deemed  necessary  or  advisable  for the
administration of the Plan.

Subject to  the  requirements of  applicable  law,  the  Committee may designate
persons  other than members of the  Committee to carry out its  responsibilities
and may prescribe such  conditions and  limitations as it may deem  appropriate,
except that the  Committee  may not  delegate its  authority  with regard to the
selection  for  participation  of or the  granting  of Awards  under the Plan to
persons   subject  to  Section  16  of  the   Exchange   Act.   All   decisions,
interpretations and other actions of the Committee shall be final and binding on
all Award  recipients,  and all  persons  deriving  their  rights  from an Award
recipient. No member of the Committee shall be liable for any action that he has
taken or has failed to take in good faith with  respect to the Plan or any Award
to acquire Shares under the Plan.

     3. Modification, Extension and Renewal of Awards. Within the limitations of
the Plan, the Committee may modify,  extend or renew  outstanding  Awards or may
accept the  cancellation  of  outstanding  Awards (to the extent not  previously
exercised)  in  return  for the grant of new  Awards at the same or a  different
price or  without  regard to such  grants.  The  foregoing  notwithstanding,  no
modification of an Award shall, without the consent of the Employee,  impair his
rights or increase his obligations under such Award.

     4.  Limitations  on SARs and Options.  No Employee shall be granted SARs or
Options  during  any  calendar  year in excess of 1.0% of the total  outstanding
shares of Common Stock of the Corporation on January 1, 1995.
                        
                         IVA. STOCK APPRECIATION RIGHTS

     1. The Committee  shall also have the authority to grant SARs on such terms
and  conditions  as it deems  appropriate,  consistent  with the purposes of the
Plan.  On surrender  of each SAR,  the SAR holder  shall  receive a cash payment
equal to the difference obtained by subtracting (1) the Fair Market Value of one
share of Common  Stock on the  surrender  date from (2) the Fair Market Value of
one share of Common Stock on the date the SAR was granted.

     2. The Committee shall from time to time determine which Employees shall be
granted  SARs under the Plan,  the terms  thereof,  and the number of SARs to be
granted.

     3. The term of a SAR shall be  determined  by the Committee but in no event
shall the term extend  beyond ten years from the date of the grant.  SARs may be
exercisable in full or in installments,  as the Committee determines at the date
of grant.

     4. The  provisions  of this Plan  applicable to Options shall apply to SARs
where the context so permits and as  necessary  to carry out the purposes of the
Plan.

                             V. ELIGIBLE EMPLOYEES

     1. The  persons  who shall be  eligible  to receive  Options  shall be such
Employees as the Committee,  in its sole  discretion,  shall select from time to
time during the duration of the Plan.

     2. A director of the  Corporation or of a Subsidiary  shall not be eligible
to receive an Option unless such director is also an Employee.

     3. No  person  shall be  eligible  to  receive  an  Option  who owns  stock
possessing more than ten percent (10%) of the total combined voting power of all
classes of stock of the Corporation or of a Subsidiary.

                          VI. OPTION EXERCISE PRICE

     The exercise price of each Option granted  hereunder shall be determined by
the Committee,  but in no event shall be less than one hundred percent (100%) of
the Fair Market Value of the Common Stock at the time such Option is granted, as
determined by the  Committee.  Such exercise price shall be adjusted as provided
in Article XII hereof.

                                      A-3

<PAGE>
                    VII. PAYMENT OF OPTION EXERCISE PRICE

     The exercise  price with respect to the Common Stock being  purchased by an
Optionee  upon the  exercise  of an Option in whole or in part  shall be paid in
full to the  Corporation  either (i) in cash,  (ii) by delivery of Common  Stock
owned by the Optionee for such duration as may be specified by the Committee and
duly endorsed for transfer to the  Corporation,  or (iii) a combination  of cash
and Common Stock.  Shares of Common Stock owned by the Optionee and delivered to
the  Corporation  in payment of all or part of the  exercise  price of an Option
shall be valued  for this  purpose  at one  hundred  percent  (100%) of the Fair
Market Value of such Common Stock on the day of such exercise,  as determined by
the Committee. Optionees electing to pay all or part of the exercise price of an
Option by delivery of Common  Stock shall not be entitled to receive  fractional
shares to the extent,  if any,  that the Fair Market  Value of such Common Stock
exceeds  such  exercise  price,  but  instead  shall be entitled to cash in lieu
thereof. To the extent that an Option Agreement so provides, payment may be made
all or in  part  by  delivery  (on a form  prescribed  by the  Committee)  of an
irrevocable  direction to a securities broker to sell shares of Common Stock and
to deliver all or part of the sale proceeds to the Corporation in payment of the
aggregate  exercise price and any taxes. To the extent that an Option  Agreement
so  provides,  payment  may also be made all or in part by  delivery  (on a form
prescribed  by the  Committee) of an election to the  Corporation  to withhold a
sufficient  number of shares from the shares  otherwise due upon exercise of the
Option  having an aggregate  Fair Market Value on the date of exercise  equal to
the exercise  price of the Option,  or by any other method of payment  permitted
under applicable laws, regulations or rules.

                     VIII. TERMS AND EXERCISE OF OPTIONS

     1. The term of each Option  granted  hereunder  shall be  determined by the
Committee,  but in no event  shall the term of an ISO be  greater  than ten (10)
years  from  the  date of  grant  or such  shorter  term as may be  fixed by the
Committee.

     2. Each Option Agreement shall specify the date when all or any installment
of the Option is to become exercisable.  The Option Agreement shall also specify
the term of the Option. Subject to the preceding two sentences, the Committee at
its sole discretion  shall determine when all or any installment of an Option is
to become exercisable and when an Option is to expire.

     3. Notwithstanding the preceding  paragraph,  all outstanding Options shall
immediately  become  exercisable  in  full  in the  event  that  either  (a) the
shareholders  of the  Corporation  approve a dissolution  or  liquidation of the
Corporation or a sale of all or substantially all of the Corporation's assets to
another  corporation,  or (b) a tender  within the  meaning of Section 14 of the
Exchange  Act is made  for  five  percent  (5%)  or  more  of the  Corporation's
outstanding  Common Stock by any person other than the Corporation or any of its
Subsidiaries.

                        IX. TERMINATION OF EMPLOYMENT

     Each  Option  Agreement  shall set forth the  extent to which the  Optionee
shall have the right to exercise the Option following  termination of employment
with  Westamerica  Bancorporation,  and the right to exercise  the Option of any
executors  or  administrators  of the  Optionee's  estate or any  person who has
acquired such  Option(s)  directly from the Optionee by bequest or  inheritance.
Such  provisions  shall be determined in the sole  discretion of the  Committee,
need not be uniform  among all  Options  issued  pursuant  to the Plan,  and may
reflect distinctions based on the reasons for termination of employment.

                            X. NON-TRANSFERABILITY

     Unless  otherwise  permitted by the Code and Section 16 of the Exchange Act
and the  interpretive  letters  thereunder,  no Option may be  transferred by an
Optionee  otherwise  than by will or the laws of descent and  distribution,  and
each  Option may be  exercised,  during  the  Optionee's  lifetime,  only by the
Optionee.

                                      A-4

<PAGE>
                    XI. RESTRICTED PERFORMANCE SHARE GRANTS

     1. The  Committee  shall  also  have  the  authority  to  award  Restricted
Performance  Share Grants  pursuant to agreements with such terms and conditions
as  it  deems  appropriate,  consistent  with  the  purposes  of  the  Plan.  In
determining  whether  or not to award a Grant to a  particular  individual,  the
Committee  shall consider the performance of Westamerica  Bancorporation  during
the prior year and such individual's performance during such year.

     2. Such key  Employees  as shall be selected by the  Committee  in its sole
discretion  (hereinafter the "Grant  Participants") shall be eligible to receive
Grants hereunder.

     3. The provisions of this Plan  applicable to Options shall apply to Grants
where the context so permits and as  necessary  to carry out the purposes of the
Plan.

     4.  A  Grant  shall  become  vested,  in  full  or  in  installments,  upon
satisfaction of the conditions set forth in the Grant  Agreement.  The Committee
in its sole discretion shall determine when all or any installment of a Grant is
to vest and when a Grant is to expire  or be  terminated.  Settlement  of vested
Grants  may be  made  in the  form of cash or  shares  of  Common  Stock  or any
combination of both, and may be made in a lump sum or  installments.  The actual
number of Grants  eligible  for  settlement  may be larger or  smaller  than the
number  included  in the Grant  Agreement,  based on  predetermined  performance
factors.

     5. All  outstanding  Grants shall  immediately be deemed to be fully vested
and the  appropriate  number of shares  of Common  Stock  shall be issued to the
Grant  Participants  in the  event  that  either  (i)  the  shareholders  of the
Corporation approve a dissolution or liquidation of the Corporation or a sale of
all or substantially all of the Corporation's assets to another corporation,  or
(ii) a tender  within the meaning of Section 14 of the  Exchange Act is made for
five percent (5%) or more of the Corporation's  outstanding  Common Stock by any
person other than the Corporation or any of its Subsidiaries.

                     XII. ADJUSTMENTS UPON CHANGES IN STOCK

     In the event that (a) each outstanding share of Common Stock (except shares
held by  dissenting  shareholders)  shall be  changed  into or  exchanged  for a
different  number  or kinds of  shares  of  stock  or  other  securities  of the
Corporation or of another  corporation,  whether through merger,  consolidation,
reorganization,  recapitalization or otherwise,  or (b) a stock dividend is paid
to holders of Common Stock or a stock split or reverse  stock split is effected,
then  the  Committee  shall  make  appropriate  and  equitable  adjustments  and
substitutions for (i) the number and type of shares appropriated for purposes of
the Plan pursuant to Article III hereof but not yet covered by Awards,  (ii) the
number and type of shares subject to each Award then outstanding,  and (iii) the
exercise price of each Award then outstanding so that there will be no change in
the  aggregate  exercise  price  payable upon the  exercise of such  outstanding
Awards and so that an Award  recipient  does not  receive  additional  benefits,
within the meaning of Section 424(a) of the Code.

             XIII. RIGHTS AS AN OPTIONEE, STOCKHOLDER, OR EMPLOYEE

     Nothing  contained in the Plan, in any resolution  adopted by the Board, in
any approval by the  stockholders  of the  Corporation or in any action taken by
the Committee shall vest in any individual employed by the Corporation or by any
Subsidiary  the right to  receive  any Award  under  the Plan.  No person  shall
acquire any rights as contemplated by or pursuant to the Plan unless and until a
written Option or Award Agreement shall have been duly executed on behalf of the
Corporation  by such officer and officers as the Committee  shall  designate for
such purpose,  delivered to the Optionee named therein,  and executed by him. No
person shall have any rights as a stockholder with respect to any shares covered
by an  Option  until  the date of the  issuance  of a stock  certificate  to the
Optionee for such shares.  Nothing contained in the Plan shall confer,  and each
Option or Award Agreement shall expressly  provide that the granting of an Award
does  not  confer  on any  Employee  any  right  to or  guarantee  of  continued
employment  by  Westamerica  Bancorporation,  or in any way  limit  the right of
Westamerica  Bancorporation  to terminate the  employment of any Employee at any
time and for any reason.

                                      A-5

<PAGE>
                             XIV. OTHER PROVISIONS

     Notwithstanding  the  express  provisions  of the Plan,  any  Option may be
granted on such additional or more restrictive terms as the Committee shall deem
advisable consistent with the Plan.

                          XV. REGISTRATION AND RESALE

     The Plan,  the  shares of Common  Stock  subject  thereto,  and the  Awards
granted  thereunder may, in the discretion of the Board, be registered under the
Securities Act of 1933, as amended,  or under the securities  laws of any state.
As a  condition  to the grant of any Award  under  the Plan or the  issuance  of
shares of Common Stock upon the exercise thereof, the Committee may require that
the  Employee  agree to  comply  with  such  provisions  of  Federal  and  State
securities  laws as may be  applicable  to such grant or issuance or the sale of
shares acquired  thereby and deliver to the  Corporation a written  agreement in
form and substance  satisfactory to the Corporation and its counsel implementing
such agreement.

               XVI. EFFECTIVE DATE, TERM AND SHAREHOLDER APPROVAL

     The Plan shall become  effective upon approval by the  stockholders  of the
Corporation and shall remain in effect until April 24, 2005, unless it is sooner
terminated  by the Board.  In any event the Plan shall  terminate  no later than
April 24, 2005, and no Awards may be granted under the Plan thereafter.

                            XVII. AMENDMENT OF PLAN

     The Board may at any time in its  discretion  terminate,  suspend,  revise,
modify or amend the Plan in any  manner  whatsoever.  An  amendment  of the Plan
shall be subject to the approval of the  stockholders of the Corporation only to
the extent required by applicable laws, regulations or rules.

                                  XVIII. TAXES

     As a condition  to the exercise of an Award,  the Employee  shall make such
arrangements  as the Committee may require for the  satisfaction of any federal,
state or local tax obligations  that may arise in connection with such exercise.
The Employee shall also make such  arrangements as the Committee may require for
the  satisfaction of any federal,  state or local tax obligations that may arise
in connection  with the  disposition of Shares  acquired by exercising an Award.
Such  arrangements  may include share  withholding or the delivery of previously
owned shares of Common Stock in accordance with the Committee's rules.

     This Plan is adopted this 25th day of April, 1995.

                                        WESTAMERICA BANCORPORATION
                                        By
                                        ----------------------------------------
                                                            Name
                                        Its
                                        ----------------------------------------
                                                            Title

                                      A-6


<PAGE>

                                                                     APPENDIX B


                                     WESTAMERICA BANCORPORATION

                                  CONFIDENTIAL VOTING INSTRUCTIONS
                 TO THE TRUSTEE SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF
                                     WESTAMERICA BANCORPORATION

                      FOR THE ANNUAL MEETING OF SHAREHOLDERS ON APRIL 25, 1995

                The  undersigned  holder  hereby  authorizes  and  instructs the
          Trustee   of   the    Westamerica    Bancorporation    Tax    Deferred
          Savings/Retirement  Plan to represent and vote,  as designated  below,
          all shares of Common  Stock of  Westamerica  Bancorporation  which the
          undersigned  would  be  entitled  to vote  at the  Annual  Meeting  of
          Shareholders of said  corporation to be held at the Showcase  Theatre,
          Marin Center,  San Rafael,  California at 7:30 p.m. on Tuesday,  April
          25, 1995 and any postponement or adjournment thereof.

   P           These  confidential  voting  instructions  to the  Trustee,  when
          properly executed, will be voted as directed herein by the undersigned
   R      shareholder.  If no direction is indicated, the Trustee will vote all
          of  the shares you  are entitled  to instruct in  the same  proportion
   O      as to which  instructions  for  other shares have been  received.  The
          Trustee  may  vote according  to its  discretion  on any other  matter
   X      which may properly come before the meeting.

   Y           PLEASE  MARK,  SIGN,  DATE AND  MAIL  THESE  CONFIDENTIAL  VOTING
          INSTRUCTIONS PROMPTLY, USING THE ENCLOSED ENVELOPE.

- ----------------------------------------
COMMENTS/ADDRESS CHANGE:               |
                                       |    (Continued and to be signed
                                       |          on other side)
                                       |
                              

<PAGE>
                                                                    Please mark
                                                             / X /   your votes
          --------                                                    as this
          COMMON
THE BOARD OF DIRECTORS RECOMMENDS A          THE BOARD OF DIRECTORS RECOMMENDS
    VOTE FOR ITEMS 1, 2, 3 AND 4.            A VOTE AGAINST ITEM 5.
 
                                  WITHHELD
                               FOR FOR ALL                 FOR  AGAINST  ABSTAIN
Item 1--ELECTION OF DIRECTORS  / /    / /    Item 3--      / /    / /      / /  
        Etta Allen, Louis E.                 APPROVAL OF
        Bartolini, Charles I.                1995 STOCK OPTION PLAN.
        Daniels, Jr., Don Emerson,           
        Emerson, Arthur C. Latno, Jr.,       Item 4--      / /    / /      / / 
        Patrick D. Lynch, Catherine C.       APPROVAL OF
        MacMillan, Dwight H. Murray, Jr.,    AUDITORS.
        Ronald A. Nelson, Carl R. Otto,      
        David L. Payne, Edward B.            Item 5--      / /    / /      / / 
        Sylvester                            SHAREHOLDERS' 
                                             PROPOSAL CONCERNING CHANGING
WITHHELD FOR: (Write that nominee's name     METHOD OF COMPENSATION
in the space provided below).                FOR DIRECTORS.

- ------------------------------------------     I PLAN TO ATTEND MEETING    / /
                     FOR  AGAINST  ABSTAIN   If you check this box to the
Item 2--APPROVAL OF  / /    / /      / /     right an admission card will
        AMENDMENT                                  be sent to you.
        OF RESTATED
        ARTICLES OF                            I have made an address      / /
        INCORPORATION.                        change or comment on the
                                             reverse side of this proxy. 


                                   Receipt   is   acknowledged   of  the   Proxy
                                   Statement for the meeting. Whether or not you
                                   expect to attend the  meeting,  you are urged
                                   to execute and return  this proxy,  which may
                                   be revoked at any time prior to its use.

SIGNATURE(S)____________________________________________ DATE___________________
    NOTE: Please sign as name appears hereon. Joint owners should each sign.
    When signing as attorney, executor, administrator, trustee or guardian,
                        please give full title as such.

                            
                              FOLD AND DETACH HERE

                        WESTAMERICA BANCORPORATION LOGO
                                  

                                                                  March 21, 1995
Dear Participant:

     As  a  participant   in  the   Westamerica   Bancorporation   Tax  Deferred
Savings/Retirement Plan (the "Plan"), you have an interest in the Annual Meeting
of  Shareholders  of Westamerica  Bancorporation  which will be held on Tuesday,
April 25,  1995 (the  "Meeting").  You may direct the Trustee of the Plan how to
vote all full and fractional shares of Westamerica Bancorporation stock standing
to the credit of your individual  account(s) (from the  Supplemental  Retirement
Plan Account,  Employer Matching Contributions and Employee Contributions) as of
December 31, 1994, and your pro rata share of any unallocated shares held by the
Plan as of March 1, 1995.

     For your  information,  we have enclosed a copy of the Proxy  Statement and
the Annual Report supplied to shareholders  of Westamerica  Bancorporation.  The
enclosed  Proxy  Statement  describes  five  proposals  to be  voted  on by  the
shareholders  of  Westamerica  Bancorporation  at  the  Meeting.  The  Board  of
Directors of Westamerica  Bancorporation recommends a vote FOR PROPOSALS 1, 2, 3
AND 4 and AGAINST  PROPOSAL 5. Please  instruct the Trustee how to vote on these
proposals by indicating your selection on the above proxy. The Trustee will keep
your  individual  instructions  confidential  and  will  not  disclose  them  to
Westamerica Bancorporation or its officers and directors.

     If the Trustee does not receive  written  instructions  from you before the
close of business  on  April 18, 1995, it will  vote all of the  shares  you are
entitled to instruct in the same  proportion as shares as to which  instructions
are received.  Under the terms of the Plan, with respect to fractional shares in
plan accounts (from the Supplemental Retirement Plan Account,  Employer Matching
Contributions and Employee  Contributions),  the Trustee may pool the results of
instructions  received from all participants to whom fractional shares have been
allocated and vote such shares accordingly.

     The Trustee  may also use its  discretion  in voting on any other  business
which may properly be brought  before the Meeting (or any  adjournment  thereof)
that was not specified in the Notice of Annual Meeting of  Shareholders,  unless
you limit the  Trustee's  authority in this respect by striking out the sentence
granting such authority on the above proxy.  Please  instruct the Trustee how to
vote your shares. A return envelope is enclosed for your convenience.

                                             Sincerely yours, 



                                             Mary Anne Bell 
                                             Assistant Corporate Secretary

 


<PAGE>

                                                                      APPENDIX C

                                WESTAMERICA BANCORPORATION

                  PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF
                                WESTAMERICA BANCORPORATION

                 FOR THE ANNUAL MEETING OF SHAREHOLDERS ON APRIL 25, 1995

                The  undersigned  holder  hereby  authorizes  A. Latno,  Jr., R.
          Nelson  and E.  Sylvester,  each with full power of  substitution,  to
          represent and vote,  as designated on the reverse side,  all shares of
          Common Stock of Westamerica Bancorporation which the undersigned would
          be  entitled  to vote at the Annual  Meeting of  Shareholders  of said
          corporation  to be held at the Showcase  Theatre,  Marin  Center,  San
          Rafael,  California at 7:30 p.m. on Tuesday,  April 25, 1995, upon the
          matters set forth on the reverse  side of this Proxy and  described in
          the  accompanying  Proxy Statement and upon such other business as may
          properly come before the meeting or any  postponement  or  adjournment
          thereof.  You may vote  according to your  discretion  (or that of the
          proxy  holder(s)  you  appoint) on any other matter which may properly
  P       come before the meeting.

  R            This Proxy,  when  properly  executed,  will be voted as directed
          herein by the undersigned  shareholder.  If no direction is indicated,
  O       this  Proxy will be voted FOR all  nominees,  FOR Items 2, 3 and 4 and
          AGAINST Item 5.
  X
              PLEASE MARK, SIGN, DATE AND MAIL THIS  PROXY PROMPTLY,  USING  THE
  Y       ENCLOSED ENVELOPE.

- ----------------------------------------
COMMENTS/ADDRESS CHANGE:               |
                                       |    (Continued and to be signed
                                       |          on other side)
                                       |
                              
                             

<PAGE>
                                                                    Please mark
                                                               /X/   your votes
          --------       ----------------------------                  as this
          COMMON         DIVIDEND REINVESTMENT SHARES
THE BOARD OF DIRECTORS RECOMMENDS A          THE BOARD OF DIRECTORS RECOMMENDS
    VOTE FOR ITEMS 1, 2, 3 AND 4.                 A VOTE AGAINST ITEM 5.
 
                                  WITHHELD
                               FOR FOR ALL                 FOR  AGAINST  ABSTAIN
Item 1--ELECTION OF DIRECTORS  / /    / /    Item 3--      / /    / /      / /  
        Etta Allen, Louis E.                 APPROVAL OF
        Bartolini, Charles I.                1995 STOCK OPTION PLAN.
        Daniels, Jr., Don Emerson,           
        Emerson, Arthur C. Latno, Jr.,       Item 4--      / /    / /      / / 
        Patrick D. Lynch, Catherine C.       APPROVAL OF
        MacMillan, Dwight H. Murray, Jr.,    AUDITORS.
        Ronald A. Nelson, Carl R. Otto,      
        David L. Payne, Edward B.            Item 5--      / /    / /      / / 
        Sylvester                            SHAREHOLDERS' 
                                             PROPOSAL CONCERNING CHANGING
WITHHELD FOR: (Write that nominee's name     METHOD OF COMPENSATION
in the space provided below).                FOR DIRECTORS.

- ------------------------------------------     I PLAN TO ATTEND MEETING    / / 
                     FOR  AGAINST  ABSTAIN   If you check this box to the
Item 2--APPROVAL OF  / /    / /      / /     right an admission card will
        AMENDMENT                                 be sent to you.
        OF RESTATED
        ARTICLES OF                          Discontinue mailing Annual    / /
        INCORPORATION.                         Report Subject to Proxy
                                                     Regulations

                                               I have made an address      / /
                                              change or comment on the
                                             reverse side of this proxy. 


                                   Receipt   is   acknowledged   of  the   Proxy
                                   Statement for the meeting. Whether or not you
                                   expect to attend the  meeting,  you are urged
                                   to execute and return  this proxy,  which may
                                   be revoked at any time prior to its use.

SIGNATURE(S)____________________________________________ DATE___________________
    NOTE: Please sign as name appears hereon. Joint owners should each sign.
    When signing as attorney, executor, administrator, trustee or guardian,
                        please give full title as such.

                            
                              FOLD AND DETACH HERE


                      MEETING TICKET REQUEST INSTRUCTIONS

                           WESTAMERICA BANCORPORATION
                         ANNUAL MEETING OF SHAREHOLDERS

                      7:30 P.M., TUESDAY, APRIL 25, 1995

                       THE SHOWCASE THEATRE, MARIN CENTER
                             SAN RAFAEL, CALIFORNIA

You can avoid registration lines by obtaining tickets in advance. If you plan to
attend the Meeting, please mark the "I Plan to Attend Meeting" box on your proxy
and  return it in the  enclosed  preaddressed  return  envelope  to  Westamerica
Bancorporation,  c/o Chemical Trust Company of California,  P.O. Box 24871,  New
York, NY  10242-4871.  You will be mailed a ticket  entitling  admission for two
people.

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

Because of seating limitations,  your ticket is valid for admission of up to two
people. If you desire additional tickets, please call Westamerica Bancorporation
at (415) 257-8024.

                    DO NOT RETURN THIS CARD WITH YOUR PROXY




SHAREHOLDER/GUEST


This is your  ticket  for  the  Westamerica  Bancorporation  Annual  Meeting  of
Shareholders, 7:30 P.M., Tuesday, April 25, 1995, at the Showcase Theatre, Marin
Center, San Rafael, California. With your ticket you can bypass the registration
process and go directly into the meeting.

Only  shareholders of record as of March 1, 1995, or their proxies,  may address
the meeting.

Thank you for your interest in  Westamerica  Bancorporation.  We look forward to
seeing you on April 25th.

                                   ADMITS TWO

Please indicate number attending _________
                              


<PAGE>
M         WESTAMERICA BANCORPORATION
E         c/o CHEMICAL TRUST COMPANY OF CALIFORNIA
E         PROXY TALLY DEPARTMENT
T         CHURCH STREET STATION
I         POST OFFICE BOX 24871
N         NEW YORK, NY 10242-4871
G

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