SUMMIT BANCSHARES INC/CA
10-K405, 1998-03-31
STATE COMMERCIAL BANKS
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                 SECURITIES AND EXCHANGE COMMISSION
                       Washington, D.C. 20549
                             Form 10-K

       ANNUAL REPORT PURSUANT TO SECTION 13 or 15 (d) OF THE
                  SECURITIES EXCHANGE ACT OF 1934

FOR FISCAL YEAR ENDED                         COMMISSION FILE NUMBER
 DECEMBER 31, 1997                                 0-11108

                      SUMMIT BANCSHARES, INC.
       (Exact name of registrant as specified in its charter)

        CALIFORNIA                        94-2767067
 (State of Incorporation)     (I.R.S. Employer Identification No.)

            2969 BROADWAY, OAKLAND, CALIFORNIA 94611
     (Address of principal executive offices and zip code)

                          (510) 839-8800
           (Registrant's area code and telephone number)

  Securities registered pursuant to Section 12 (b) of the Act: NONE
    Securities registered pursuant to Section 12 (g) of the Act:

                     Common Stock, No Par Value

Indicate by check mark whether the registrant (1) has filed all reports 
required to be filed by Section 13 or 15 (d) of the Securities 
Exchange Act of 1934 during the preceding 12 months (or for 
such shorter period that registrant was required to file such 
reports), and (2) has been subject to such filing requirements 
for the past 90 day period.

          Yes __X__                             No _______

Indicate by check mark if disclosure of delinquent filers pursuant to Item 
405 of Regulation S-K is not contained herein and will not be contained, to 
the best of the registrant's knowledge, in definitive proxy or information 
statements incorporated by reference in Part III of this Form 10-K or any 
amendment to this Form 10-K.
                                                          / X /

State the aggregate market value of the common stock held by non-affiliates 
of the registrant. The aggregate market value shall be computed by reference 
to the price at which the stock was sold, or the average of bid and asked 
prices of such stock, as of a specified date within 60 days prior to the date 
of filing:

                        $15,835,662.00 (1)

Indicate the number of shares outstanding of each of the registrant's classes 
of common stock, as of the latest practicable date:

                       437,455 shares no par common stock
                        issued as of February 27, 1998

                                      -1-
<PAGE>

                Documents Incorporated By Reference

- ---------------
1

   For purposes of this calculation only, shares are deemed to have  market 
   value of $54.00, the average of bid and asked prices on February 27, 1998, 
   and each of the executive officers, directors and persons holding 5% or more 
   of the outstanding common stock is deemed to be an affiliate.

                                      -2-

<PAGE>

       Portions of Registrant's Annual Report to Shareholders
            for the Fiscal Year Ended December 31, 1997
                  are Incorporated by Reference into
                   Part II of This Form 10-K Report

       Portions of Registrant's Proxy Notice and Statement
          of Annual Meeting of Shareholders to be Held on
                 April 22, 1998 are Incorporated by
               Reference into Part III, Items 10, 11,
                12, and 13 of this Form 10-K Report


                              PART I

    The matters addressed in this Report on Form 10K, with the exception of 
the historical information presented, may incorporate certain forward-looking 
statements involving risks and uncertainties, including the risks discussed 
under the heading "Certain Factors That May Affect Future Results" and 
elsewhere in this Report.

ITEM 1. BUSINESS

    Summit Bancshares, Inc. (the "Company") is a one-bank holding company 
registered under the Bank Holding Company Act of 1956, as amended. It was 
incorporated under the laws of the State of California on July 22, 1981. Its 
principal office is located at 2969 Broadway, Oakland, California 94611, and 
its telephone number is (510) 839-8800.

    On March 1, 1985, the Bank opened a banking facility at 112 La Casa Via, 
Walnut Creek, California 94596, which moved into new quarters located at 1700 
N. Main, Walnut Creek, California 94598 in September, 1990. The telephone 
number is (510) 935-9220. In addition, a full service branch began operation 
in December, 1985, in the Watergate III Tower at 2000 Powell Street, 
Emeryville, California 94608. The telephone number is (510) 428-1868. Also, 
on January 28, 1998, the Bank opened a new full service branch at 5820 
Stoneridge Mall Road, Suite 100, Pleasanton, California 94588.

    Summit Bancshares, Inc. owns all of the capital stock of Summit Bank (the 
"Bank"), its subsidiary bank, and its activities during 1997 were limited to 
acting as the Bank's holding company.

    The Bank has conducted the business of a commercial bank since July 1, 
1982. The Bank provides commercial credit and other banking services to small 
and mid-sized businesses and professionals, including professional firms of 
physicians, attorneys, accountants, retailers and service firms, wholesalers 
and distributors. Because of the concentration of medical facilities and 
related organizations, the growth of real estate opportunities and 
commercial/industrial businesses in the Bank's service area, the Bank 
primarily focuses its marketing efforts on health service businesses, real 
estate construction and commercial industrial loans; however, the Bank also 
offers a broad

                                     -3-                                     
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spectrum of financial services to the business community at large. The Bank 
offers various checking and savings accounts for both personal and business 
purposes, time certificates of deposit, cashier's checks, money orders, 
travelers checks, safe deposit boxes, installment collection services, night 
depository, depository pickup and courier services, telephone transfers, 
collection services for notes, Individual Retirement and Business Planning 
(formerly Keogh) Accounts. The Bank has not requested and does not have 
regulatory approval to offer trust services, although it may provide such 
services in the future. The Bank assists customers requiring services not 
offered by the Bank in obtaining such services from its correspondent banks 
and other financial services firms. Although the Bank does not actively 
solicit consumer business from the general public, it does offer banking 
services and facilities compatible with the need of its consumer customers.

    The banking offices in Walnut Creek and Pleasanton offer virtually the 
same services listed above with the exception of safe deposit boxes. The 
Emeryville Office offers all the same services as the Oakland Office.

    On March 30, 1989, the State Banking Department approved the Bank's 
application to establish a new subsidiary, Summit Equities, Inc, whose 
purpose is to engage in real property investment activities as authorized by 
Section 751.3 of the California Financial Code. On November 13, 1992 the FDIC 
imposed regulations limiting real estate investment to those authorized by 
national banks, thus no real estate transactions are allowed to be transacted 
under this subsisdiary. The corporation is exploring other avenues or types 
of approved investment activities. As of this date, the subsidiary has not 
conducted any business.

SERVICE AREA

    The primary geographic market served by the Bank is consider to be 
Alameda County in its entirety and Contra Costa County except several cities 
and sparsely populated areas in the northern and easternmost sections. Pinole 
is partly excluded. Hercules, Rodeo, Crockett and Port Costa are excluded. 
West Pittsburg and cities east of it are excluded. The sparseley populated 
areas east of Mt. Diablo are excluded. These areas include a substantial 
number of commercial businesses, a large health services complex and 
substantial residential population. In Alameda County, the health services 
complex includes three major hospitals, approximately 432 physicians and a 
wide variety of health related and other professionals, and small and 
medium-sized businesses. Contra Costa County includes three major hospitals, 
approximately 410 physicians some of which are also affiliated with the 
hospitals in Alameda County, and other professionals and small and 
medium-sized businesses.

    The Walnut Creek office is about 16 miles northeast of the head office in 
Oakland and located in the central business district in Walnut Creek. The 
site is approximately 1 mile west of John Muir Hospital, which is a 343-bed 
hospital employing approximately 1200 people and accommodates a large staff 
of approximately 290 visiting physicians. The surrounding service area 
includes 4 convalescent hospitals, an acute psychiatric care facility, and 
the 204-bed Kaiser Foundation Hospital, which employs over 1000 people in 
downtown Walnut Creek and is staffed by approximately 89 physicians.

                                     -4-                                     
<PAGE>

The Emeryville office is a further extension of the Bank's plan to expand 
into areas which will further utilize specialized services directed at 
medium-sized businesses and professionals. Located west of Interstate 880 at 
2000 Powell Street, it is servicing a commercial sector and an up-scale 
employee population.

    The Pleasanton office is about 30 miles southeast of the head office in 
Oakland and located in the adjacent to the central shopping mall in the city 
of Pleasanton. It is approximately one mile from the Hacienda Industrial 
Park, the primary center for commercial and industrila growth in the area. It 
is also one block from a major medical office complex.

    The Bank also obtains business clients from the varioius areas within the 
city of Oakland, adjacent to the John Muir and Kaiser areas of Walnut Creek, 
in and in the industrial and commercial areas of Emeryville and Pleasanton. 
The Bank's customers are primarily business and professional persons working 
in the vicinity of each branch, officers and employees of businesses and 
professional firms serviced by the Bank, and residents of areas close to the 
Bank.

COMPETITION

    The banking business in the Oakland/East Bay metropolitan area is very 
competitive with respect to both loans and deposits, and is dominated by 
relatively few major banks which have offices operating throughout 
California. Among the advantages such banks have are their ability to finance 
wide-ranging advertising campaigns, to offer certain services (for example, 
trust services) which are not offered directly by the Bank, and to have 
substantially higher legal lending limits due to their greater 
capitalization. There are eleven other independent banks in Oakland, Walnut 
Creek, Pleasanton, and none in Emeryville.

    In competing for deposits, the Bank is subject to certain limitations not 
applicable to non-bank financial institution competitors. Over the past 
years, legislative changes have enabled the Bank to compete more effectively 
for deposits with savings and loan institutions but still remains at a 
competitive disadvantage when competing with money market funds.

    To compete with major financial institutions and other independent banks 
in its primary service areas, the Bank relies upon the experience of its 
executive officers in serving business clients, its specialized services, 
local promotional activity, personal contacts by its officers, directors, and 
employees of the Company. For customers whose loan demands exceed the Bank's 
legal lending limit, the Bank arranges for such loans on a participation 
basis with correspondent banks as well as other independent banks.

REGULATION AND SUPERVISION

    THE COMPANY. The Company is a bank holding company within the meaning of 
the Bank Holding Company Act of 1956, as amended (the "BHC Act"), and is 
registered as such with the Federal Reserve Board (FRB). A bank holding 
company is required to file with the FRB annual

                                     -5-                                     
<PAGE>

reports and other information regarding its business operations and those of 
its subsidiaries. It is also subject to examination by the FRB and is 
required to obtain FRB approval before acquiring, directly or indirectly, 
ownership or control of any voting shares of any bank, if after such 
acquisition, it would directly or indirectly own or control more than 5% of 
the voting stock of that bank. The BHC Act further provides that the FRB 
shall not approve any such acquisition that would result in or further the 
creation of a monopoly, or the effect of which may be to substantially lessen 
competition, unless the anticompetitive effects of the proposed transaction 
are clearly outweighed by the probable effect in meeting the convenience and 
needs of the community to be served.

    Furthermore, under the BHC Act, a bank holding company is, with limited 
exceptions, prohibited from (i) acquiring direct or indirect ownership or 
control of more than 5% of the voting shares of any company which is not a 
bank, or (ii) engaging in any activity other than managing or controlling 
banks. With the prior approval of the FRB, however, a bank holding company 
may own shares of a company engaged in activities which the FRB has 
determined to be so closely related to banking or managing or controlling 
banks as to be a proper incident thereto.

    The FRB has by regulation determined that certain activities are so 
closely related to banking as to be a proper incident thereto within the 
meaning of the BHC Act. These activities include, but are not limited to: 
operating an industrial loan company, industrial bank, Morris Plan Bank, 
savings association, mortgage company, finance company, credit card company 
or factoring company; performing certain data processing operations; 
providing investment and financial advice; operating as a trust company in 
certain instances, selling traveler's checks, United States savings bonds and 
certain money orders; providing certain courier services; providing 
management consulting advice to nonaffiliated depository institutions in some 
instances; acting as insurance agent for certain types of credit-related 
insurance; leasing property or acting as agent, broker or advisor for leasing 
property on a "full pay-out basis"; acting as a consumer financial counselor, 
including tax planning and return preparation; performing futures and options 
advisory services, check guarantee services and discount brokerage 
activities; operating a collection or credit bureau; or performing personal 
property appraisals. The Company has no present intention to engage in any of 
such permitted activities at this time.

    The FRB also has determined that certain activities are not so closely
related to banking to be a proper incident thereto within the meaning of the BHC
Act. Such activities include: real estate brokerage and syndication; land
development; property management; underwriting of life insurance not related to
credit transactions; and with certain exceptions, securities underwriting and
equity funding. In the future, the FRB may add or delete from the list of
activities permissible for bank holding companies. Under the BHC Act, a bank
holding company and its subsidiaries are prohibited from acquiring any voting
shares of or interest in all or substantially all of the assets of any bank
located outside the state in which the operations of the bank holding company's

                                     -6-                                     
<PAGE>

banking subsidiaries are principally conducted, unless the acquisition is 
specifically authorized by the law of the state in which the bank to be 
acquired is located or unless the transaction qualifies under federal law as 
an "emergency interstate acquisition" of a closed or failing bank. The 
California interstate banking bill is described under "Interstate Banking" 
(below).

    A bank holding company and its subsidiaries are prohibited from certain 
tie-in arrangements in connection with any extension of credit, sale or lease 
of a property or furnishing of services. For example, with certain 
exceptions, a bank may not condition an extension of credit on a promise by 
its customer to obtain other services provided by it, its holding company or 
other subsidiaries, or on a promise by its customer not to obtain other 
services from a competitor. In addition, federal law imposes certain 
restrictions on transactions between the Company and its subsidiaries, 
including the Bank. As an affiliate of the Bank, the Company is subject, with 
certain exceptions, to provisions of federal law imposing limitations on, and 
requiring collateral for, extensions of credit by the Bank to its affiliates.

    Directors of the Company, and the companies with which they are 
associated, have had and will continue to have banking transactions with the 
Bank in the ordinary course of the Bank's business. It is the firm intention 
of the Company that any loans and commitments to loan included in such 
transactions be made in accordance with applicable law, on substantially the 
same terms, including interest rates and collateral, as those prevailing at 
the time for comparable transactions with other persons of similar 
creditworthiness, and on terms not involving more than the normal risk of 
collectability or presenting other unfavorable features. At December 31, 
1997, loans to directors totalled $.1 million or 1.3% of the Company's 
shareholders' equity.

    THE BANK. The Bank is a member of the FDIC which currently insures the 
deposits of each member bank to a maximum of $100,000 per depositor. For this 
protection, the Bank pays a semi-annual assessment and is subject to the 
rules and regulations of the FDIC pertaining to deposit insurance and other 
matters.

    The Bank is subject to regulation, supervision and regular examination by 
the California State Banking Department (the "Department"). Although the Bank 
is a non-member of the Federal Reserve System, it is subject to regulation, 
supervision, but not examination by the FRB. The regulations of these 
agencies govern most aspects of the Bank's business, including the making of 
periodic reports by the Bank and the Bank's activities, branching, mergers 
and acquisitions, reserves against deposits and numerous other areas.

    Subject to the regulations of the California Superintendent of Banks (the
"Superintendent"), the Bank may invest in capital stock, obligations or other
securities of other corporations, provided such corporations are not insurance
companies, agents or brokers. In addition, the Bank may acquire any or all of
the securities of a

                                     -7-                                     
<PAGE>

company that engages in activities that the Bank may engage in directly under 
California law without the prior approval of the FRB. California 
state-chartered banks are also specifically authorized to provide real estate 
appraisal services, management consulting and advisory services and 
electronic data processing services.

    The Company's primary source of income (other than interest earned on 
Company capital) is the receipt of dividends and management fees from the 
Bank. The ability of the Bank to pay management fees and dividends to the 
Company and its affiliates is subject to restrictions set forth in the 
California Financial Code and, under certain circumstances, is subject to 
approval of the Department. The board of directors of a state-chartered bank 
may declare a dividend out of so much of net profits as such board deems 
appropriate, subject to California law which restricts the amount available 
for cash dividends to the lesser of retained earnings or the bank's net 
income less cash dividends paid for its last three fiscal years.

    In the event that a bank has no retained earnings or net income for the 
prior three fiscal years, cash dividends may be paid out of net income for 
such bank's last preceding fiscal year or current fiscal year upon the prior 
approval of the Department. Although there are not specific regulations 
restricting dividend payments by bank holding companies other than state 
corporation law, supervisory concern focuses on the holding company's capital 
position, its ability to meet its financial obligations as they come due and 
the capacity to act as a source of financial strength to its subsidiary banks.

    The FRB and the Superintendent have authority to prohibit a bank from 
engaging in business practices which are considered to be unsafe or unsound. 
Depending upon the financial condition of the Bank and upon other factors, 
the FRB or Superintendent could assert that the payments of dividends or 
other payments by the Bank to the Company might be such an unsafe or unsound 
practice. Also, if the Bank were to experience either significant loan losses 
or rapid growth in loans or deposits, or some other event resulting in a 
depletion or deterioration of the Bank's capital account were to occur, the 
Company might be compelled by federal banking authorities to invest 
additional capital in the Bank necessary to return the capital account to a 
satisfactory level.

    IMPACT OF ECONOMIC CONDITIONS AND MONETARY POLICIES. The earnings and 
growth of the Company are and will be affected by general economic 
conditions, both domestic and international, and by the monetary and fiscal 
policies of the United States Government and its agencies, particularly the 
FRB. One function of the FRB is to regulate the national supply of bank 
credit in order to mitigate recessionary and inflationary pressures. Among 
the instruments of monetary policy used to implement those objectives are 
open market transactions in United States Government securities and changes 
in the discount rate on member bank borrowings. The monetary policies of the 
FRB have had a significant effect on the operating results of commercial 
banks in the past and are expected to continue to do so in the future. 
However, the effect, if any, of such policies on the future business and 
earnings of the Company cannot be accurately predicted.

                                     -8-                                     
<PAGE>

    ACCOUNTING CHANGES. Statement of Financial Accounting Standards No. 123 
(SFAS No. 123) "Accounting for Stock Based Compensation," is effective for 
transactions entered into for fiscal years beginning after December 15, 1995 
and applies to awards made in fiscal years beginning after December 15, 1994. 
This statement defines a fair-value method of accounting for stock-based 
compensation. As permitted by SFAS No. 123, the Company accounts for stock 
options under APB Opinion No. 25, under which no compensation cost has been 
recognized. The company has made no awards under its stock option plans 
subsequent to January 1, 1995. As such, pro forma net income and earnings per 
share data as if compensation cost for these plans had been determined 
consistent with SFAS No. 123 would not differ from the reported amounts in 
the Company's income statement.

Statement of Financial Accounting Standards No. 128 "Accounting for Earnings 
Per Share" is effective for fiscal years ended after December 15, 1997 and 
requires restatement of prior periods earnings per share. Basic earnings per 
share is computed by dividing income available to common shareholders by the 
weighted average number of common shares outstanding during the period. 
Diluted earnings per share is computed by dividing diluted income available 
to shareholders by the weighted average number of common shares and common 
equivalent shares outstanding which include dilutive stock options. The 
computation of common stock equivalent shares is based on the weighted 
average market price of the Company's common stock throughout the period.

In June 1997, the Financial Accounting Standards Board (FASB) issued ("SFAS") 
No. 130, "Reporting Comprehensive Income." This statement established 
requirements for disclosure of comprehensive income and will become effective 
for the Company's 1998 fiscal year, with reclassification of earlier 
financial statements for comparative purposes. Comprehensive income generally 
represents contributions by shareholders. The Company is evaluating 
alternative formats for presenting this information, but does not expect this 
pronouncement to materially impact the Company's current reporting and 
disclosures.

In June 1997, the Financial Accounting Standards Board (FASB) issued SFAS No. 
131, "Disclosures about Segments of an Enterprise and Related Information" 
("SFAS 131"). This statement establishes standards for disclosures abut 
operating segments in annual financial statements and selected information in 
interim financial reports. It also establishes standards for related 
disclosures about products and services, geographic areas and major 
customers. This statement supersedes SFAS No. 14 "Financial Reporting for 
Segments of a Business Enterprise. SFAS 131 will become effective for the 
Company's 1998 fiscal year and requires that comparative information from 
earlier years to be restated to conform to the requirements of this standard. 
The Company is evaluating the requirements of SFAS 131 and the effects, if 
any, on the Company's current reporting and disclosures.

LEGISLATION AND PROPOSED CHANGES. From time to time, legislation is enacted 
which has the effect of increasing the cost of doing business, limiting or 
expanding permissible activities or affecting the competitive balance between 
banks and other financial institutions. Proposals to change the laws and 
regulations governing the operations and taxation of

                                     -9-                                     
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banks, bank holding companies and other financial institutions are frequently 
made in Congress, in the California legislature and before various bank 
regulatory agencies. No prediction can be made as to the likelihood of any 
major changes or the impact such changes might have on the Company. Certain 
changes of potential significance to the Company which have been enacted 
recently or others which are currently under consideration by Congress or 
various regulatory or professional agencies are discussed below.

    FINANCIAL INSTITUTIONS REFORM, RECOVERY AND ENFORCEMENT ACT OF 1989. On 
August 9, 1989, President Bush signed into law the Financial Institutions 
Reform, Recovery and Enforcement Act of 1989 ("FIRREA"). FIRREA contains 
provisions, which among other things: (1) establish two separate financial 
industry insurance funds, both administered by the FDIC - the Bank Insurance 
Fund and the Savings Association Fund; (2) abolish the Federal Home Loan Bank 
Board and establish the Office of Thrift Supervision as an office of the 
Treasury Department, with responsibility for examination and supervision of 
all savings and loan associations; (3) increase the insurance premiums paid 
by FDIC-insured institutions; (4) permit bank holding companies to acquire 
healthy savings and loan associations; (5) enhance federal banking agencies' 
enforcement authority over the operations of all insured depository 
institutions and increase the civil and criminal penalties that may be 
imposed in connection with violations of laws and regulations; (6) curtail 
investments and certain activities of state-chartered savings and loan 
associations; and (7) increase the capital requirements of savings and loan 
associations. Management of the Company does not believe that the provisions 
of FIRREA have had or will have a material adverse impact on the Company's 
consolidated financial position or results of operations.

    COMPETITIVE EQUALITY BANKING ACT. The Competitive Equality Banking Act of 
1987 contained provisions which, among other things: (1) permanently closed 
the loophole which formerly allowed for the creation of "non-bank banks"; (2) 
limited the restrictions imposed on banks on the availability of funds 
deposited by check; and (3) provided explicit leasing authority for national 
banks. The enactment of this legislation has not had a material adverse 
effect on the Company's consolidated financial condition or results of 
operations.

    INTERSTATE BANKING. In September, 1986, California adopted an interstate 
banking law. The law allows California banks and bank holding companies to be 
acquired by banking organizations in other states on a reciprocal basis 
(i.e., provided the other state's laws permit California banking 
organizations to acquire banking organizations in that state on substantially 
the same terms and conditions applicable to banking organizations solely 
within that state). The law took effect in two stages. The first stage, which 
became effective July 1, 1987, allowed acquisitions on a reciprocal basis 
within a region consisting of all 11 states (Alaska, Arizona, Colorado, 
Hawaii, Idaho, Nevada, New Mexico, Oregon, Texas, Utah and Washington) which 
currently permit acquisitions by California banking organizations of banks 
and bank holding companies in such states. The second stage, which became 
effective January 1, 1991, allows interstate acquisitions on a national 
reciprocal basis. The Company believes that this legislation will further 
increase competition

                                   -10-                                     
<PAGE>

as out-of-state financial institutions enter the California market. Most 
recently U.S. Bancorp purchased California Bancshares, Inc., a community- 
based holding company with approximately 21 independent banks in the 
surrounding area in which the Bank operates. U. S. Bancorp was subsequently 
purchased by First Bank headquartered in Minneapolis. It is anticipated that 
such a purchase may in fact be beneficial to the Bank as it may open 
opportunities to prospects that enjoy dealing with a community bank. If there 
is a negative effect on the Bank it might be that this merger may increase 
the resources available to the 21 independent banks being purchased.

    CAPITAL ADEQUACY GUIDELINES. The FRB has issued capital adequacy 
guidelines establishing a risk-based capital framework consisting of a 
definition of capital comprised of a core component (essentially 
shareholders' equity less goodwill) ("Tier 1 capital"), a supplementary 
component ("Tier 2 capital"), a system for assigning assets & off-balance 
sheet items to four weighted risk categories (with higher levels of capital 
being required for the categories being perceived as representing greater 
credit risk) and a schedule for achieving a minimum risk-based capital ratio 
of 7.25% by the end of 1990 (which at least 3.625% should be in the form of 
common shareholders' equity) and 8% by the end of 1992 (which at least 4% 
should be in the form of common shareholders' equity). An institution's 
risk-based capital would be determined by dividing its qualifying capital by 
its risk-weighted assets.

    The guidelines make regulatory capital requirements more sensitive to the 
differences in risk profiles among banking institutions, take off-balance 
sheet items into account when assessing capital adequacy and minimize 
disincentives to holding liquid low-risk assets. In addition, the guidelines 
may require some banking institutions to increase the level of their common 
shareholders' equity. It is not anticipated that the guidelines will have a 
material adverse effect on the Company's financial condition or results of 
operations over the short term. At the end of 1997, the guidelines provided 
for a minimum risk-based capital ratio of 8%, and this provision may limit 
the Company's ability to increase its assets or require the Company to raise 
additional equity to facilitate growth.

    On August 2, 1990, the FRB adopted standards for compliance by banking 
organizations with risk-based capital guidelines to include a minimum 
leverage ratio of 3% of Tier 1 capital to total average assets (the "leverage 
ratio") based upon the definition of Tier 1 capital for 1997. The FRB 
emphasized that the leverage ratio constitutes a minimum requirement for 
well-run banking organizations having diversified risk, including no undue 
interest rate risk exposure, excellent asset quality, high liquidity, good 
earnings and a favorable composite rating under the applicable regulatory 
rating system. Banking organizations experiencing or anticipating significant 
growth, as well as those organizations which do not exhibit the 
characteristics of a strong well-run banking organization described above, 
will be required to maintain minimum capital ranging from 100 to 200 basis 
points in excess of the leverage ratio.

                                   -11-                                     
<PAGE>

    The FRB leverage ratio establishes a new limit on the ability of banking 
organizations to increase assets and liabilities without increasing capital 
proportionately. In management's opinion, the leverage ratio will have no 
material effect on its capital needs in the foreseeable future. The Bank's 
leverage ratio at December 31, 1997 was 9.1% (See "Summit Bancshares, Inc. 
1997 Annual Report - Footnote #8).

EMPLOYEES

   On December 31, 1997 the Bank employed 38 full time employees and 3 part 
time employees for a total equivalent of 40.4 full time employees. At the 
present time there are no salaried employees of the Company.

                                   -12-                                     

<PAGE>

          DISTRIBUTION OF ASSETS, LIABILITIES AND SHAREHOLDERS' EQUITY

     The following table summarizes the distribution, by amount (in 
thousands) and percentage of the daily average assets, liabilities, and 
shareholders' equity of Summit Bancshares, Inc. (consolidated) for the year 
ended December 31, 1997. Comparative figures for the years ended December 31, 
1996 and 1995, are also provided:

<TABLE>
<CAPTION>

                                          1997                     1996                       1995
                                 ----------------------    ----------------------    ----------------------
ASSETS                            AMOUNT     PERCENTAGE     AMOUNT     PERCENTAGE     AMOUNT     PERCENTAGE
- ------                           -------     ----------    -------     ----------    -------     ----------
<S>                              <C>         <C>           <C>         <C>           <C>         <C>

Cash and Due
  From Banks                     $ 6,858        7.20%      $ 5,874        6.71%      $ 5,494         6.88%
Time Deposits with Other
  Financial Institutions           7,896        8.20        10,039       11.47         8,467        10.60
Investment
  Securities:
    Taxable                       10,923       11.39         8,522        9.74         8,346        10.45
    Non-taxable                        0           0             0           0           836         1.05
Federal Funds
    Sold                          10,105       10.54        11,428       13.05         6,573         8.23
Loans, Net                        56,746       59.17        47,253       53.99        45,818        57.38
Other Assets                       3,360        3.50         4,417        5.04         4,320         5.41
                                 -------      ------       -------      ------       -------       ------
  TOTAL ASSETS                   $95,888      100.00%      $87,533      100.00%      $79,854       100.00%
                                 -------      ------       -------      ------       -------       ------
                                 -------      ------       -------      ------       -------       ------

LIABILITIES & SHAREHOLDERS' EQUITY

Deposits:
  Demand                         $25,082       26.16%      $22,037       25.18%      $20,005        25.05%
  Interest bearing
    transaction accounts          32,914       34.33        29,751       33.99        28,714        35.96
  Savings                          2,345        2.44         2,287        2.61         2,701         3.38
  Time                            22,750       23.73        20,677       23.62        17,072        21.38
Other Liabilities                    768        0.80         1,130        1.29           573          .72
Shareholders' Equity              12,029       12.54        11,651       13.31        10,789        13.51
                                 -------      ------       -------      ------       -------       ------
  TOTAL LIABILITIES &
    SHAREHOLDERS' EQUITY         $95,888      100.00%      $87,533      100.00%      $79,854       100.00%
                                 -------      ------       -------      ------       -------       ------
                                 -------      ------       -------      ------       -------       ------

</TABLE>

                                     -13-

<PAGE>

     The following is an analysis of Net Interest Income for 1997. 
Comparative figures for 1996 and 1995 are also presented on the following 
pages. Non-accrual loans are included in the average balances. Balances are 
expressed in thousands of dollars.

<TABLE>
<CAPTION>

                                           FOR THE YEAR ENDED DECEMBER 31, 1997
                                           ------------------------------------
                                                         INTEREST       RATES
                                            AVERAGE       INCOME/      EARNED/
                                            BALANCE      EXPENSE        PAID
                                            -------      -------      --------
<S>                                         <C>          <C>          <C>
ASSETS
Time Deposits with Other
  Financial Institutions                    $ 7,896       $  450          5.70%
Investment Securities (footnote #1)          10,923          665          6.09
Federal Funds Sold                           10,105          556          5.50
Loans (Interest and Fees)                    56,746        6,726*        11.85
                                            -------       ------         -----
    Total Earning Assets                    $85,670       $8,397          9.80%
                                                          ------         -----
                                                          ------         -----
Cash and Due from Banks                       6,858
Premises and Equipment                          826
Other Assets                                  2,534
                                            -------
TOTAL ASSETS                                $95,888
                                            -------
                                            -------

LIABILITIES AND SHAREHOLDERS' EQUITY

Deposits:
  Demand                                    $25,082       $ --              --%
  Savings                                     2,345           45          1.92
  Interest-bearing Transaction               32,914          637          1.93
  Time                                       22,750        1,258          5.53
                                            -------       ------
  Total Deposits                            $83,091       $1,940          2.33%
                                                          ------         -----
                                                          ------         -----
Other Liabilities                               768
Shareholders' Equity                         12,029
                                            -------
TOTAL LIABILITIES AND
  SHAREHOLDERS' EQUITY                      $95,888
                                            -------
                                            -------
AS A PERCENTAGE OF AVERAGE
  TOTAL EARNING ASSETS:
  Interest and Fee Income                                 $8,397
  Interest Expense                                         1,940
                                                          ------
  NET INTEREST INCOME AND MARGIN                          $6,457          7.47%
                                                          ------         -----
                                                          ------         -----
</TABLE>

* Includes loan fees of $594,000

1.)  Investment income rate is not calculated on a tax equivalent basis.

                                     -14-

<PAGE>

<TABLE>
<CAPTION>

                                           FOR THE YEAR ENDED DECEMBER 31, 1996
                                           ------------------------------------
                                                         INTEREST       RATES
                                            AVERAGE       INCOME/      EARNED/
                                            BALANCE      EXPENSE        PAID
                                            -------      -------      --------
<S>                                         <C>          <C>          <C>
ASSETS
Time Deposits with Other
  Financial Institutions                    $10,039       $  564          5.62%
Investment Securities (footnote #1)           8,522          511          6.00
Federal Funds Sold                           11,428          602          5.27
Loans (Interest and Fees)                    47,253        5,699*        12.07
                                            -------       ------
    Total Earning Assets                    $77,242       $7,376          9.55%
                                                          ------         -----
                                                          ------         -----
Cash and Due from Banks                       5,874
Premises and Equipment                          872
Other Assets                                  3,545
                                            -------
TOTAL ASSETS                                $87,533
                                            -------
                                            -------

LIABILITIES AND SHAREHOLDERS' EQUITY

Deposits:
  Demand                                    $22,037       $   --            --%
  Savings                                     2,287           43          1.88
  Interest-bearing Transaction               29,751          628          2.11
  Time                                       20,677        1,267          6.13
                                            -------       ------
  Total Deposits                            $74,752       $1,938          2.59%
                                                          ------         -----
                                                          ------         -----
Other Liabilities                             1,130
Shareholders' Equity                         11,651
                                            -------
TOTAL LIABILITIES AND
  SHAREHOLDERS' EQUITY                      $87,533
                                            -------
                                            -------
AS A PERCENTAGE OF AVERAGE
  TOTAL EARNING ASSETS:
  Interest and Fee Income                                 $7,376
  Interest Expense                                         1,938
                                                          ------
  NET INTEREST INCOME AND MARGIN                          $5,438          6.96%
                                                          ------         -----
                                                          ------         -----

</TABLE>

* Includes loan fees of $457,000

1.)  Investment income rate is not calculated on a tax equivalent basis.

                                     -15-
<PAGE>

<TABLE>
<CAPTION>

                                           FOR THE YEAR ENDED DECEMBER 31, 1995
                                           ------------------------------------
                                                         INTEREST       RATES
                                            AVERAGE       INCOME/      EARNED/
                                            BALANCE      EXPENSE        PAID
                                            -------      -------      --------
<S>                                         <C>          <C>          <C>
ASSETS
Time Deposits with Other
  Financial Institutions                    $ 8,467       $  493          5.82%
Investment Securities (footnote #1)           9,182          559          6.09
Federal Funds Sold                            6,573          374          5.69
Loans (Interest and Fees)                    45,818        5,574*        12.07
                                            -------       ------
    Total Earning Assets                    $70,040       $7,000          9.99%
                                                          ------         -----
                                                          ------         -----
Cash and Due from Banks                       5,494
Premises and Equipment                          827
Other Assets                                  3,493
                                            -------
TOTAL ASSETS                                $79,854
                                            -------
                                            -------

LIABILITIES AND SHAREHOLDERS' EQUITY

Deposits:
  Demand                                    $20,005       $   --            --%
  Savings                                     2,701           53          1.96
  Interest-bearing Transaction               28,714          620          2.16
  Time                                       17,072          863          5.06
                                            -------       ------
  Total Deposits                            $68,492       $1,536          2.24%
                                                          ------         -----
                                                          ------         -----
Other Liabilities                               573
Shareholders' Equity                         10,789
                                            -------
TOTAL LIABILITIES AND
  SHAREHOLDERS' EQUITY                      $79,854
                                            -------
                                            -------
AS A PERCENTAGE OF AVERAGE
  TOTAL EARNING ASSETS:
  Interest and Fee Income                                 $7,000
  Interest Expense                                         1,536
                                                          ------
  NET INTEREST INCOME AND MARGIN                          $5,464          7.75%
                                                          ------         -----
                                                          ------         -----

</TABLE>

* Includes loan fees of $483,000

1.)  Investment income rate is not calculated on a tax equivalent basis.

                                     -16-

<PAGE>

    Following is an analysis of changes in Interest Income and Expense (in 
thousands of dollars) for 1997 over 1996. A similar comparison for 1996 over 
1995 is on the following page. Changes not solely attributed to volume or 
rates have been allocated proportionately to volume and rate components.

<TABLE>
<CAPTION>

                                            1997 OVER 1996
                                      ---------------------------
                                      VOLUME      RATE      TOTAL
                                      ------     ------     ------
<S>                                   <C>        <C>        <C>
INCREASE (DECREASE) IN
  INTEREST AND FEE INCOME

Time Deposits with Other
  Financial Institutions              $(122)      $   8     $(114)

Investment Securities                   144          10       154

Federal Funds Sold                      (72)         26       (46)

Loans, Net                             1133        (106)     1027
                                      ------     ------     ------
Total Increase in
  Interest and Fee Income              1083         (62)     1021
                                      ------     ------     ------
                                      ------     ------     ------
INCREASE IN
INTEREST EXPENSE

Savings Deposits                          2           0          2

Interest-bearing Transaction             64         (55)         9

Time Deposits                           126        (135)        (9)
                                      ------     ------     ------
Total Increase in
  Interest Expense                      192        (190)         2
                                      ------     ------     ------
INCREASE IN
NET INTEREST INCOME                   $ 891       $ 128      $1019
                                      ------     ------     ------
                                      ------     ------     ------
</TABLE>

                                     -17-

<PAGE>

<TABLE>
<CAPTION>

                                            1997 OVER 1996
                                      ---------------------------
                                      VOLUME      RATE      TOTAL
                                      ------     ------     ------
<S>                                   <C>        <C>        <C>
INCREASE (DECREASE) IN
  INTEREST AND FEE INCOME

Time Deposits with Other
  Financial Institutions              $  88        ($17)       $71

Investment Securities                   (40)         (8)       (48)

Federal Funds Sold                      257         (29)       228

Loans, Net                              172         (47)       125
                                      ------     ------     ------
Total Increase in
  Interest and Fee Income               477        (101)       376
                                      ------     ------     ------
INCREASE IN
  INTEREST EXPENSE

Savings Deposits                         (8)         (2)       (10)

Interest-bearing Transaction             22         (14)         8

Time Deposits                           202         202        404
                                      ------     ------     ------
Total Increase in
  Interest Expense                      216         186        402
                                      ------     ------     ------
INCREASE IN
  NET INTEREST INCOME                  $261       ($288)      ($26)
                                      ------     ------     ------
                                      ------     ------     ------
</TABLE>

                                     -18-

<PAGE>

INVESTMENT SECURITIES

    The following table sets forth the book value as of December 31 for the 
securities indicated:

<TABLE>
<CAPTION>
                            1997          1996            1995
                        -----------     ----------     ----------
<S>                     <C>             <C>            <C>

U. S. Treasury
 Securities             $ 5,496,831     $7,759,850     $6,018,457

U. S. Agencies            6,999,820      1,000,000              0

    TOTAL               $12,496,651     $8,759,850     $6,018,457
                        -----------     ----------     ----------
                        -----------     ----------     ----------
</TABLE>

The amortized cost and estimated fair values of investment in debt securities 
for 1997 are as follows:

<TABLE>
<CAPTION>
                                              GROSS       GROSS        ESTIMATED
                             AMORTIZED     UNREALIZED   UNREALIZED       FAIR
                               COST           GAINS       LOSSES         VALUE
                            -----------    ----------   ----------    -----------
<S>                         <C>            <C>          <C>           <C>
U.S. Treasury
  securities                $ 5,496,831       $10,599     $    0      $ 5,507,430

U.S. Agencies                 6,999,820         8,406          0        7,008,226

    TOTAL                   $12,496,651       $19,005     $    0      $12,515,656
                            -----------    ----------   ----------    -----------
                            -----------    ----------   ----------    -----------
</TABLE>

    The amortized cost and estimated market value of debt securities at 
December 31, 1997 by contractual maturity are shown below.  Expected 
maturities will differ from contractual maturities because borrowers may have 
the right to call or prepay obligations with or without call or prepayment 
penalties.

<TABLE>
<CAPTION>
                                                         ESTIMATED
                                         AMORTIZED          FAIR
                                           COST            VALUE
                                        -----------      -----------
<S>                                     <C>              <C>
Due in one year or less                 $ 7,798,908      $ 7,817,913

Due after one year through
  five years                              4,697,743        4,697,743
                                        -----------      -----------

    TOTAL                               $12,496,651      $12,515,656
                                        -----------      -----------
                                        -----------      -----------
</TABLE>

There were no sales of investments in debt securities during 1997.

                                     -19-

<PAGE>

     The following table is a summary of the relative maturities and yields 
of Summit Bancshares, Inc. investment securities as of December 31, 1997 and 
1996. Yields on securities have been computed by dividing interest income, 
adjusted for amortization of premium and accretion of discount, by book 
values of the related securities.

<TABLE>
<CAPTION>
                         MATURING       MATURING AFTER ONE
                     WITHIN ONE YEAR    THROUGH FIVE YEARS            TOTAL
                   ------------------   ------------------   -------------------
                     AMOUNT     YIELD     AMOUNT     YIELD      AMOUNT     YIELD
                   ----------   -----   ----------   -----   -----------   -----
<S>                <C>          <C>     <C>          <C>     <C>           <C>
                   DECEMBER 31, 1997

U. S. Treasury
  Security         $3,999,088   6.02%   $1,497,743   6.38%   $ 6,496,831   6.10%

U. S. Agencies      3,799,820   6.23     3,200,000   6.15      6,999,820   6.19
                   ----------   -----   ----------   -----   -----------   -----
       TOTAL       $7,798,908   6.09%   $4,697,743   6.22    $12,496,651   6.14%
                   ----------   -----   ----------   -----   -----------   -----
                   ----------   -----   ----------   -----   -----------   -----

                   DECEMBER 31, 1996

U. S. Treasury
  Security         $3,762,149   5.66%   $3,997,701   6.01%   $ 7,759,850   5.84%

U. S. Agencies              0      0     1,000,000   6.00      1,000,000   6.00
                   ----------   -----   ----------   -----   -----------   -----
       TOTAL        3,762,149   5.66%    4,997,701    6.01   $ 8,759,850   5.86%
                   ----------   -----   ----------   -----   -----------   -----
                   ----------   -----   ----------   -----   -----------   -----
</TABLE>

                                     -20-

<PAGE>

LOAN PORTFOLIO

COMPOSITION OF LOANS

    The following table shows the composition of loans (in thousands of 
dollars) of Summit Bancshares, Inc. as of December 31 for each respective 
year designated.

<TABLE>
<CAPTION>
                               1997         1996         1995
                              -------      -------      -------
<S>                           <C>          <C>          <C>
Commercial and
  Financial                   $44,044      $35,789      $30,471
Real Estate, Including
  Construction                 12,321       10,571       14,625
Installment                     5,706        6,119        5,524
Leases                              0            0           51
                              -------      -------      -------
                               62,071       52,478       50,671

Less Unearned Lease Income          0            0           (1)
Less Reserve for
  Possible Loan Losses         (1,238)      (1,070)      (1,025)
                              -------      -------      -------
TOTAL                         $60,833      $51,408      $49,645
                              -------      -------      -------
                              -------      -------      -------
</TABLE>

MATURITY, DISTRIBUTION AND INTEREST RATE
SENSITIVITY OF LOANS

    The following table shows the maturity distribution of loans (in 
thousands of dollars) as of December 31, 1997.

<TABLE>
<CAPTION>
                                   LOANS WITH A MATURITY OF
                      --------------------------------------------------
                      ONE YEAR     ONE THROUGH     OVER FIVE
                      OR LESS      FIVE YEARS        YEARS         TOTAL
                      -------      ----------      ---------      -------
<S>                   <C>          <C>              <C>           <C>
Commercial and
  Financial           $21,757        $18,819        $3,468        $44,044
Real Estate 
  Construction          7,471              0             0          7,471
                      -------        -------        ------        -------
TOTAL                 $29,228        $18,819        $3,468        $51,515
                      -------        -------        ------        -------
                      -------        -------        ------        -------
</TABLE>

    All but six loans for $1,886,525 reported above which have maturities of  
   over one year are at floating interest rates.

                                     -21-


<PAGE>

COMMITMENTS AND LINES OF CREDIT

The Company is a party to financial instruments with off-balance-sheet risk 
in the normal course of business to meet the financing needs of its 
customers. These financial instruments include commitments to extend credit, 
and standby letters of credit. Those instruments involve, to varying degrees, 
elements of credit risk in excess of the amount recognized in the statement 
of financial position. The contract amount of those instruments reflects the 
extent of involvement the Company has in particular classes of financial 
instruments.

      The Company's exposure to credit loss in the event of nonperformance 
by the other party to the financial instrument for commitments to extend 
credit and standby letters of credit is represented by the contractual 
notional amount of those instruments. The Company uses the same credit 
policies in making commitments and conditional obligations as it does for 
on-balance-sheet instruments. At December 31, 1997, financial instruments 
whose contract amounts represent credit risk:

<TABLE>
<CAPTION>
                                                          CONTRACT       AMOUNT
                                                        -----------      ------
<S>                                                     <C>              <C>  
Financial instruments whose contract
  amount represents credit risk:

  Commitments to extend credit in the future            $19,076,880

  Standby letters of credit                               1,067,554
</TABLE>

      Commitments to extend credit are agreements to lend to a customer as 
long as there is no violation of any condition established in the contract. 
Commitments generally have fixed expiration dates or other termination 
clauses and may require payment of a fee. Since many of the commitments are 
expected to expire without being drawn upon, the total commitment amounts do 
not necessarily represent future cash requirements. The Company evaluates 
each customer's credit worthiness on a case-by-case basis. The amount of 
collateral obtained if deemed necessary by the Company upon extension of 
credit is based on management's credit evaluation of the counter-party. 
Collateral held varies but may include accounts receivable, inventory, 
property, plant, and equipment, and income-producing commercial properties.

      Standby letters of credit are conditional commitments issued by the 
Company to guarantee the performance of a customer to a third party. Most all 
guarantees expire within a 1 year. The credit risk involved in issuing 
letters of credit is essentially the same as that involved in extending loan 
facilities to customers.

      A part of the subsidiary Bank's marketing strategy is to offer quality 
financial services to the professional and small business communities. The 
Company has been especially successful in targeting health care 
professionals. This segment has traditionally provided high levels of 
deposits and low loan losses. Approximately 11.8% of the Company's loans are 
concentrated with health care professionals.

                                     -22-
<PAGE>

NON-PERFORMING LOANS AND
SUMMARY OF LOAN LOSS EXPERIENCE
(In thousands of dollars)

<TABLE>
<CAPTION>

                           DEC. 31, 1997      DEC. 31, 1996      DEC. 31, 1995
                           -------------      -------------      -------------
<S>                        <C>                <C>                <C>          
Non-accrual loans                 $  176             $    0             $   39

90 days past due but
 still accruing                      408                  0                367
                                  ------             ------             ------
Total non-accrual
 and 90 days past
  due loans                          584                  0                406

Other real estate owned            1,222              1,291              1,303
                                  ------             ------             ------
Total Non-performing
 assets                           $1,806             $1,291             $1,709
                                  ------             ------             ------
                                  ------             ------             ------
</TABLE>

      The subsidiary Bank's policy is to recognize interest income on an accrual
basis unless the full collectibility of principal and interest is uncertain.
Loans that are delinquent 90 days as to principal or interest are placed on a
non-accrual basis, unless they are well secured and in the process of
collection, and any interest earned but uncollected is reversed from income.
Collectibility is determined by considering the borrower's financial condition,
cash flow, quality of management, the existence of collateral or guarantees and
the state of the local economy.

      The total OREO amount, $1,222,000, is related to two properties. One of 
the properties is vacant land in the Oakland Hills. The second property is 
two continguous parcels in the Danville/Diablo Mountain area of Alameda 
County and is currently in escrow at a purchase price of $1,300,000 and is 
scheduled to close by August, 1998. The remaining parcel is currently on the 
market for sale.

     The allowance for loan losses is maintained at a level considered
adequate to provide for losses that can be reasonably anticipated. The reserve
is increased by provisions and reduced by net charge-offs. The Bank makes
credit reviews of the loan portfolio, considers current economic conditions,
loan loss experience, and other factors in determining the adequacy of the
reserve balance. The allowance for loan losses is based on estimates and
ultimate losses may vary from current estimates. As adjustments become
necessary, they are reported in earnings in the periods in which they become
known.

      Any loans classified for regulatory purposes as loss, doubtful, 
substandard, or special mention that have not been disclosed under Item III 
of Industry Guide 3 do not (i) represent or result from trends or 
uncertainties which management reasonably expects will materially impact 
future operating results, liquidity or capital resources, or (ii) represent 
material credits about which management is aware of any information which 
causes management to have serious doubts as to the ability of such borrowers 
to comply with the loan repayment program.

                                     -23-
<PAGE>

      An analysis of activity in the allowance for loan losses for the years
ended December 31 is as follows:

<TABLE>
<CAPTION>

                                    1997          1996          1995
                                 ----------    ----------   -----------
<S>                               <C>           <C>         <C>        
    Balance at beginning
     of period                   $1,070,318     1,024,922      $931,878
                                 ----------    ----------   -----------
    Provision for possible
     loan losses                    270,000       125,000       415,000
                                 ----------    ----------   -----------
    Loan charged off
      Commercial                     96,934        16,952       302,640
      Real Estate Construction            0             0         2,384
      Installment                     8,372        66,152        28,684
                                 ----------    ----------   -----------
       Total chargeoffs             105,306        83,104       333,708
                                 ----------    ----------   -----------
    Recoveries
      Commercial                          0             0         8,677
      Real Estate Construction            0             0             0
      Installment                     3,000         3,500         3,075
                                 ----------    ----------   -----------
       Total recoveries               3,000         3,500        11,752
                                 ----------    ----------   -----------
    Net chargeoffs                  102,306        79,604       321,956
                                 ----------    ----------   -----------
    Balance at end of period
                                 $1,238,012    $1,070,318    $1,024,922
                                 ----------    ----------   -----------
                                 ----------    ----------   -----------
    Ratio of net charge-
     offs to average
     loans outstanding                  .18%          .18%          .70%
                                 ----------    ----------   -----------
                                 ----------    ----------   -----------

</TABLE>

                                     -24-
<PAGE>

TIME DEPOSITS IN THE AMOUNT OF $100,000 AND OVER

      The following table sets forth by time remaining to maturity, Summit 
Bank's issuance of time deposits in the amount of $100,000 or more (in 
thousands of dollars) as of December 31 of the respective year designated:

<TABLE>
<CAPTION>

                          1997                      1996                      1995
                   ------------------        ------------------        ------------------
                   AMOUNT  PERCENTAGE        AMOUNT  PERCENTAGE        AMOUNT  PERCENTAGE
                   ------  ----------        ------  ----------        ------  ----------
<S>                <C>     <C>               <C>     <C>               <C>     <C>       

3 months or less   $12,171      64.6%        $10,621      69.5%        $ 8,049      61.5%

Over 3 through
 6 months            4,230      22.5           3,499      22.7           3,546      27.1

Over 6 through
 12 months           2,227      11.8           1,205       7.8           1,403      10.7

Over 12 months         200       1.1               0         0             100        .7
                   -------     -----         -------    ------         -------     -----
TOTAL              $18,828     100.0%        $15,325     100.0%        $13,098     100.0%
                   -------     -----         -------    ------         -------     -----
                   -------     -----         -------    ------         -------     -----
</TABLE>

RETURN ON EQUITY AND ASSETS

      The following table shows key financial ratios for the years ending 
December 31, 1997, 1996 and 1995

<TABLE>
<CAPTION>

                                          1997        1996        1995
                                         -----       -----       -----
<S>                                      <C>         <C>         <C>  
Return on average assets                  1.78%       1.61%       1.65%
Return on average shareholders'
 equity                                  14.20%      12.11%      12.19%
Dividend payout ratio                    37.88%      48.70%      48.39%
Average shareholders' equity
 as a percent of:
        Average Assets                   12.54%      13.31%      13.51%
        Average Deposits                 14.48%      15.59%      15.75%
</TABLE>

                                     -25-
<PAGE>

INTEREST RATE SENSITIVITY/INTEREST RATE RISK ANALYSIS

      The following table provides an interest rate sensitivity and interest 
rate risk analysis for the year ended 1997. The table presents each major 
category of interest- earning assets and interest-bearing liabilities.

                                          INTEREST RATE RISK REPORTING SCHEDULE

REPORTING INSTITUTION:  SUMMIT BANK                  REPORTING DATE:   12/31/97

<TABLE>
<CAPTION>

                                       REMAINING TIME BEFORE MATURITY OR INTEREST RATE ADJUSTMENT

                                                                   GREATER         GREATER      GREATER      GREATER
                                                                    THAN             THAN        THAN         THAN
                                                                    3 MO             1 YR        3 YRS        5 YRS
                                       ($000.00)                    LESS             LESS        LESS         LESS
                                        OMITTED         UP          THAN             THAN        THAN         THAN        OVER
                                          TOTAL        3 MO         1 YR             3 YRS       5 YRS       10 YRS      10 YRS
                                       --------       -------      -------        ---------     -------     -------    -------
<S>                                    <C>            <C>          <C>             <C>           <C>         <C>        <C>   
 I.    EARNING ASSETS

   A.  INVESTMENTS:

    1.   U. S. TREASURIES               $ 5,497       $ 1,000      $ 2,999        $  1,498      $      0      $     0    $     0
    2.   U. S. AGENCIES                   7,000         2,800        1,500           2,700             0            0          0
    3.   FED FUNDS                       12,910        12,910            0                0            0            0          0
    4.   PURCHASED CDS                    5,644         1,782        2,277           1,585             0            0          0
                                        -------       -------     --------        ---------     --------      -------    -------
            TOTAL INVESTMENTS           $31,051       $18,492     $  6,776        $  5,783      $      0      $     0    $     0

   B.  LOANS                            $60,873       $57,819     $  1,476        $    578      $    305      $   695    $     0

   C.  TOTAL EARNING ASSETS             $91,924       $76,310     $  8,252        $  6,361      $    305      $   695    $     0

 II.   COST OF FUNDS (DEPOSITS)

   A.  CERTIFICATES OF DEPOSITS         $24,093       $14,774     $  8,943        $    350      $    20       $     6    $     0
   B.  MONEY MARKET ACCOUNTS             28,947         1,608       13,468          13,870            0             0          0
   C.  TRANSACTIONS ACCOUNTS              6,312           271          811           2,140        1,538         1,552          0
   D.  SAVINGS ACCOUNTS                   2,265             0           47           1,109          552           557          0
                                        -------       -------     --------        --------      -------       -------    -------
      TOTAL COST OF FUNDS               $61,617       $16,653     $ 23,270        $ 17,469      $ 2,110       $ 2,115    $     0

 III. INTEREST SENSITIVE ASSETS         $91,924       $76,310     $  8,252        $  6,361      $   305       $   695    $     0

 IV.  INTEREST SENSITIVE LIABILITIES    $61,617       $16,653     $ 23,270        $ 17,469      $ 2,110       $ 2,115    $     0
                                        -------       -------     --------        ---------     -------       -------    -------
 V.   GAP                               $30,307       $59,657     $(15,018)       $(11,108)     $(1,805)      $(1,420)   $     0

 VI.  CUMULATIVE GAP                    $30,307       $59,657     $ 44,639        $ 33,531      $31,726       $30,307    $30,307

 VII. GAP RATIO                            1.49          4.58         0.35            0.36         0.14          0.33       1.49

 VIII.CUMULATIVE RATIO                     1.49          4589         2.12            1.58         1.53          1.49       1.49

 IX.  GAP AS % OF TOTAL ASSETS            29.45         57.98       (14.60)         (10.80)       (1.75)        (1.38)
 
 X.   CUMULATIVE GAP AS A % OF
          TOTAL ASSETS                    29.45         57.98        43.39           32.59        30.83         29.45      29.45

</TABLE>

                                     -26-

<PAGE>

ITEM 2.     PROPERTIES

      When the Bank first entered into its initial lease agreement it signed 
a ten-year lease which commenced September 1, 1981 (with options to extend 
the lease on the same terms and conditions for two additional five-year 
periods). This space housed the permanent Head Offices for the Bank and the 
Company at 2969 Broadway, Oakland, California 94611 at the intersection of 
Broadway and 30th Street in the "Pill Hill" area. The premises consisted of 
approximately 3,800 square feet located in a portion of a single story 
building on the southwest corner at the intersection. The Bank spent 
approximately $388,448 on leasehold improvements at this location. 
Improvements consisted of a complete remodeling of the facility, including a 
new roof, new facade, new floor, partitions and structural improvements.

      In September, 1987 the Bank entered into an additional ten year lease 
for 6,010 sq. ft. adjacent to its location in Oakland.  The Bank utilizes 
approximately 2,900 sq. ft. of this new area.  The Bank's cost of leasehold 
improvements in this new location was approximately $294,000.  Improvements 
consisted of a complete remodeling of the facility, including a new facade, 
new floor, partitions and structural improvements.  The initial lease in the 
above paragraph has expired and has been rolled into this new lease.  The 
current monthly rent for the entire 9,810 sq. ft. is $5,226.00 subject to 
yearly CPI adjustments.

      Commencing on December 1, 1984, the Bank leased 720 square feet of 
office space in a new building at 112 La Casa Via in Walnut Creek, 
California. This location housed the Bank's initial branch office. The 
building was fully serviced and the base rental was $1,274 per month subject 
to cost-of-living adjustments on the anniversary of each rental year. 
Necessary leasehold improvements were completed within the landlord's 
authorized allowance. The term of this lease expired on November 30, 1989, 
however, the Bank negotiated a month to month lease pending its move to new 
quarters in September, 1990. Monthly rent was $1,502.83.

      In September, 1989, the Bank entered into a new lease for 1,400 sq. ft. 
of office space located at the corner of No. Main Street and Civic Drive in 
downtown Walnut Creek.  This new location is twice the physical size of the 
old location and is closer to the financial district of Walnut Creek. The 
Bank moved into this new location in September, 1990. The new lease is for a 
term of 12 years commencing November 1, 1989 and terminates January 14, 2001. 
The Bank's cost for leasehold improvement in this new location was 
approximately $210,000. Improvements consisted of a complete remodeling of 
the facility, including enclosing an existing drive through facility, 
partitions and structural improvements. The lease provides for a monthly rent 
of $4,769.80, fixed for 12 years and beginning January 1, 1991.

      The Emeryville Branch began operations in December, 1985 on the ground 
floor of the Watergate III Building at 2000 Powell Street. The Bank currently 
occupies approximately 2,200 square feet of space at this location, at a base 
rent of $2.00 per net rentable square foot ($4,390 per month). The term of 
this lease expired August 31, 1992 with two successive options to extend the 
lease by one three year option and one

                                     -27-


<PAGE>

five year option. The Bank renewed the lease at a base rent of $1.95 per net 
rentable square foot ($4,329 per month) with two three year options effective 
1-1-93 which expired December 31, 1995. The Bank subsequently renewed the 
lease at a base rent of $2.05 per net rentable square foot ($4,651 per month) 
with two three year options effective 1-1-96.

      In September, 1990 the Company purchased two contiguous parcels 
totaling 10,000 sq. ft. adjacent to the Bank's Walnut Creek Office for a 
price of $544,644. Included on one of the parcels is a single story, 2,500 
sq. ft. concrete block building suitable for a restaurant. The Company 
entered into a five year lease on April 1, 1991 with an individual who 
operates a Japanese restaurant at this location for a monthly rent of $4,350, 
triple net commencing April 1, 1992. The leasee in turn made improvements to 
the building to bring it to today's standards. On April 1, 1996, the Bank 
entered into a three year lease agreement with the son of the same Japanese 
restaurant for a monthly rent of $4,350, triple net ending on March 31, 1999.

      The Pleasanton Branch began operations on January 28, 1998 at 5820 
Stoneridge Mall Rd. The Branch occupies an office on the ground floor at this 
location with monthly rent of $1,669.00 commencing on December 1, 1997 for a 
term of one year.

ITEM 3.     LEGAL PROCEEDINGS

      From time to time the Company is a party to claims and legal 
proceedings arising in the ordinary course of business. Currently, the 
Company has no outstanding suits brought against it.

ITEM 4.     SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

      Neither the Company nor the Bank submitted any matter covered by this 
report to a vote of security holders, through the solicitation of proxies or 
otherwise, during the fourth quarter of 1997.

              EXECUTIVE OFFICERS OF SUMMIT BANCSHARES, INC.

      Pursuant to General Instruction G(3), the information required by Item 
401(b) and (e) of Regulation S-K concerning executive officers of the Company 
and the Bank is presented here rather than in the Company's Proxy Statement 
for the Annual Meeting of Shareholders to be held on April 22, 1998.

      The following individuals are the executive officers of the Company as 
of February 27, 1998:

<TABLE>
<CAPTION>
Name                   Age       Position               Since
<S>                    <C>       <C>                    <C>
Shirley W. Nelson      53        Chairman and Chief     1982
                                 Executive Officer

George H. Hollidge     54        Secretary              1981

Kikuo Nakahara         65        Chief Financial        1985
                                 Officer
</TABLE>
                                     -28-


<PAGE>

      The following individuals are the executive officers of the Bank as of 
February 27, 1998:

<TABLE>
<CAPTION>
Name                   Age       Position               Since
<S>                    <C>       <C>                    <C>
Shirley W. Nelson      53        Chairman, and          1982
                                 Chief Executive
                                 Officer

C. Michael Ziemann     53        President and          1996
                                 Chief Operating
                                 Officer

Denise Dodini          45        Senior Vice            1994
                                 President and
                                 Senior Loan
                                 Officer
</TABLE>

The business experience of the executive officers follows:

      SHIRLEY W. NELSON was President and Chief Executive Officer of the Bank 
and Holding Company since May, 1983 and was elected in July, 1989 to the 
position of Chairman. Prior to this assignment she was the Senior Vice 
President, Senior Loan Officer. She is currently a member of the Board of 
Directors' Audit Commitee, Asset and Liability Committee, Loan Committee, and 
Personnel Committee.

      KIKUO NAKAHARA is Managing Director of American Express Tax and 
Business Services Inc. in Walnut Creek, California. Prior to this position he 
was a partner of Greene & Nakahara, an accounting firm in Walnut Creek since 
1993, and which merged with IDS Financial Services Inc. in 1994. From 1978 to 
1993 he was managing Director of Greene, Nakahara and Lew Accountancy 
Corporation in Oakland. He was a corporate member of Blue Shield and a 
speaker at continuing education courses sponsored by the California Society 
of Certified Public Accountants.

      GEORGE H. HOLLIDGE has been President of Hollidge Transmissions, Inc., 
Oakland, transmission specialists, since 1980.  Prior to 1980, Mr. Hollidge 
was a partner in Hollidge Hydramatic, transmission specialists.

      C. MICHAEL ZIEMANN has been President and Chief Operating Officer since 
January 1, 1996. Prior to this position he was Chief Administrative Officer 
subsequent to his position as CFO and Cashier to which he was appointed in 
April, 1987. Prior to that he was active in the administration of the Bank 
and was the manager of the Bank's Walnut Creek Office since April 1985. Prior 
to joining the Bank, he held various positions during his 16 years with Bank 
of America in operations, branch management, and regional administration 
where he was a district administrator.

                                     -29-


<PAGE>

      DENISE DODINI has been the Senior Vice President - Senior Loan Officer 
at the Bank since July, 1994. Prior to joining the Bank, Denise had fifteen 
years of Banking experience with Bank of America, where she was involved in 
consumer, commercial, real estate, and corporate lending. Denise joined the 
Bank in October, 1989 as a Vice President, Loan Officer where she assisted 
clients in the Oakland Office.

                                   PART II

ITEM 5.     MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED
            SECURITY HOLDER MATTERS

      (a) MARKET INFORMATION.  The stock of the Company is not listed on any 
stock exchange but is publicly traded in limited and infrequent transactions 
in the "over the counter" market. According to information made available to 
the Company by the Market Maker, Marc F. Arnett, Hoefer & Arnett, Investment 
Bankers, 100 Pine Street, San Francisco, CA., the range of high and low bids 
for such common stock for each calendar quarter since January 1994 is as 
follows:

<TABLE>
<CAPTION>
                                                 Dividends
                            High       Low        Declared
<S>                       <C>         <C>        <C>
1997

  First Quarter......     $33 3/4     32 3/4      $  --
  Second Quarter.....      37 1/2     33 1/8        .75
  Third Quarter......      47  --     37  --         --
  Fourth Quarter.....      56  --     43  --        .75
                                                  -----
                                                  $1.50
                                                  =====
1996

  First Quarter......     $28 1/8     26 1/4      $  --
  Second Quarter.....      29 1/2     28  --        .75
  Third Quarter......      34 1/2     29 1/2         --
  Fourth Quarter.....      32 3/4     32 1/2        .75
                                                  -----
                                                  $1.50
                                                  =====
</TABLE>

      As of February 27, 1998, there were 437,455 shares of common stock of 
the Company issued.

      (b) SHAREHOLDERS.  As of February 27, 1998, there were 309 shareholders 
of the common stock. There were no other classes of securities outstanding.

      (c) DIVIDENDS.  On June 6, 1997 the Company paid a 75 cent per share 
cash dividend in addition to a similar 75 cent per share dividend on December 
12, 1997. It is the present intention of the Company to issue semi-annual 
cash dividends so long as said dividends do not inhibit future development. 
Additionally, payment of cash dividends by the Company is dependent upon 
payment of dividends by the Bank to the Company. Payment of cash dividends by 
the Bank may under certain

                                     -30-


<PAGE>

circumstances require approval of the California Superintendent of Banks, and 
as a matter of law, the Bank may only declare cash dividends from the lesser 
of its retained earnings or its undistributed net income from the last three 
years. less any dividends paid during those three years. In the event that 
the Bank does not have retained earnings or net income for the last three 
fiscal years, the Bank may declare dividends only with the prior written 
consent of the Superintendent.

                                     -31-

<PAGE>

ITEM 6.     SELECTED FINANCIAL DATA

      The following selected financial information of Summit Bancshares, Inc. 
for the years from the period January 1, 1993 through December 31, 1997 
should be read in conjunction with the consolidated financial statements and 
the accompanying notes included elsewhere in this Annual Report.

<TABLE>
<CAPTION>

                                         FINANCIAL HIGHLIGHTS
- -------------------------------------------------------------------------------------------------------

FOR THE YEAR ENDED DECEMBER 31,              1997         1996          1995         1994        1993
                                         ----------    ----------    ----------    --------    --------
<S>                                      <C>           <C>           <C>           <C>         <C>
Net Income                               $1,708,154    $1,411,871    $1,315,507    $907,603    $846,771

Earnings Per Common Share                     $3.97         $3.32         $3.10       $2.19       $2.03

Earning Per Common Share -
  assuming dilution                           $3.72         $3.11         $2.87       $2.08       $1.99

Cash Dividends per Share, declared            $1.50         $1.50         $1.50       $0.49       $0.24


AT YEAR END
(In Thousands)

Deposits                                    $90,432       $80,510        $75,251    $67,862     $70,462

Loans (Net)                                 $60,833        51,408         49,645     46,691      50,541

Assets                                     $104,342        92,946         86,822     78,601      80,356

Shareholders' Equity                        $12,879        11,939         11,102     10,494       9,626

Non-performing Loans to Total Loans           0.96%         0.00%           .82%      1.66%       1.88%

Allowance to Non-performing Loans              212%           N/A           252%       120%         75%

Allowance to Non-performing Assets              68%          .82%            60%        26%         29%

Tier 1 Capital                               13.71%        14.41%         12.19%     13.33%      11.55%

Total Tier Capital                           14.92%        15.61%         13.29%     14.44%      12.66%

Leverage Ratio                                9.12%         9.63%          9.24%     10.40%       8.95%

</TABLE>

                                     -32-


<PAGE>

ITEM 7:     MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
            CONDITION AND RESULTS OF OPERATIONS

      The section labeled Management's discussion of Analysis of Financial 
Condition and Results of Operation appearing in the Registrant's Annual 
Report to stockholders for the year ended December 31, 1997 are incorporated 
by reference herein.

ITEM 8.     FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

      The consolidated statement of financial position as of December 31, 
1997 and 1996 and the consolidated statements of income, changes in 
shareholders' equity and cash flows for the years ended December 31, 1997, 
1996, and 1995, together with the report of independent public accountant 
appearing in the Registrant's Annual Report to stockholders for the year 
ended December 31, 1997 are incorporated by reference herein.

                                     -33-


<PAGE>

ITEM 9.     CHANGES ON AND WITH ACCOUNTANTS ON ACCOUNTING AND
            FINANCIAL DISCLOSURES

      None

                                   PART III

ITEM 10.    DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

      The information required by paragraphs (a), (c) (d), (f) and (g) of 
this item is presented in the Company's Proxy Statement issued in connection 
with the Annual Meeting of Shareholders to be held on April 22, 1998 under 
"Election of Directors," which is incorporated in this Report by reference 
thereto and will be filed within 120 days after the end of the Company's 
fiscal year. The information concerning executive officers requested by 
paragraphs (b) and (e) is set forth under Part I in a separate Item captioned 
Executive Officers of Summit Bancshares, Inc.

ITEM 11.    EXECUTIVE COMPENSATION

      The information required by this item in presented in the Company's 
Proxy Statement issued in connection with the Annual Meeting of Shareholders 
to be held on April 22, 1998. under "Executive Compensation," which is 
incorporated in this Report by reference thereto and will be filed within 120 
days after the end of the Company's fiscal year.

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
            MANAGEMENT

      The information required by this item is presented in the Company's 
Proxy Statement issued in connection with the Annual Meeting of Shareholders 
to be held on April 22, 1998, under "Principal Security Holders" and 
"Security Ownership of Management," which is incorporated in this Report by 
reference thereto and will be filed within 120 days after the end of the 
Company's fiscal year.

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      The information required by this item is presented in the Company's 
Proxy Statement issued in connection with the Annual Meeting of Shareholders 
to be held April 22, 1998, under "Certain Relationships and Related 
Transactions," which is incorporated in this Report by reference thereto and 
will be filed within 120 days after the end of the Company's fiscal year.

                                     -34-

<PAGE>

                            PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON
          FORM 8-K

(a)  1.  CONSOLIDATED FINANCIAL STATEMENTS.
     
     The following Financial Statements are included in the Registrant's 
     Annual Report to Shareholders for the year ended December 31, 1997 
     and are incorporated by reference herein pursuant to Item 8.

     Consolidated Statement of Financial Position - December 31, 1997 and 1996

     Consolidated Statements of Income for the years ended December 31, 1997,
     1996 and 1995

     Statements of Changes in Shareholders' Equity (Consolidated
     and Parent Company Only) for the years ended December 31,
     1997, 1996 and 1995

     Consolidated Statements of Cash Flows for the years ended December 31,
     1997, 1996 and 1995.

     Notes to Consolidated Financial Statements

     Report of Independent Accountants

(b)  2.  FINANCIAL STATEMENT SCHEDULES.

              Not Applicable

     In accordance with the rules of Regulation S-X, the required schedules
     are not submitted because they are not applicable to or required of the
     Company.

(c)  3.  INDEX TO EXHIBITS.

     The following exhibits are incorporated by reference pursuant to Item 601
     of Regulation S-K:

<TABLE>
<CAPTION>
                                                   Sequentially
                                                     Numbered
Exhibit Number               Exhibit                   Page
<S>               <C>                              <C>
    3.1           Articles of Incorporation        Footnote #1
                  of Summit Bancshares, Inc.

    3.2           Bylaws of Summit
                  Bancshares, Inc.                 Footnote #2
</TABLE>

                                     -35-

<PAGE>

<TABLE>
<CAPTION>
                                                   Sequentially
                                                     Numbered
Exhibit Number               Exhibit                   Page
<S>               <C>                              <C>
   4.1            Specimen Stock Certificate       Footnote #3

  10.1            Lease - Broadway Property        Footnote #4

  10.2            Summit Bancshares, Inc.
                  Incentive Stock Option Plan      Footnote #5

  10.3            Organizational Stock
                  Agreement                        Footnote #6

  10.4            Employment Agreement/
                  Shirley W. Nelson                Footnote #7

  10.5            Agreement for Sale
                  of Stock                         Footnote #8

  10.6            Lease-Walnut Creek
                  Property                         Footnote #9

  10.7            Lease-Emeryville
                  Property                         Footnote #10

  10.8            Lease-Oakland Office
                  Expansion                        Footnote #11

  10.9            Lease-Walnut Creek
                  New Premises                     Footnote #12

  10.10           Lease-Emeryville
                  Renegotiated                     Footnote #13

  10.11           Summit Bancshares, Inc.
                  1989 Non-Qualified Stock Option
                  Plan for Directors               Footnote #14

  10.12           Stock Option Agreement Form
                  Summit Bancshares, Inc.
                  Incentive Stock Option Plan      Footnote #15

  10.13           Stock Option Agreement Form
                  1989 Non-Qualified Stock Option
                  Plan for Directors               Footnote #16

  10.14           Amendment to By-Laws of
                  Summit Bancshares, Inc.          Footnote #17
</TABLE>

                                     -36-

<PAGE>

<TABLE>
<CAPTION>
                                                   Sequentially
                                                     Numbered
Exhibit Number               Exhibit                   Page
<S>               <C>                              <C>
  10.15           Lease - Walnut Creek
                  Summit Bancshares, Inc.
                  owned Property.                  Footnote #18

  10.16           Lease - Emeryville
                  Renegotiated                     Footnote #19

  10.17           Lease - Pleasanton                 -------
                  New Premises

  11              Statement Re: Computation
                  of Per Share Earnings

  13              Portions of Annual Report to
                  Shareholders for the Year Ended
                  December 31, 1997

  22              Wholly Owned Subsidiary of
                  Summit Bank - Summit Equities,
                  Inc.

  25.1            Power of Attorney - see
                  Signature Page

  27              Financial Data Schedule
</TABLE>

- ----------------
   1.  Incorporated by reference to Exhibit 2.1 of Registrant's Exhibits to
       Form S-18 Registration Statement, as filed with the Securities and
       Exchange Commission on December 21, 1981.

   2.  Incorporated by reference to Exhibit 2.2 of Registrant's Exhibits to
       Form S-18 Registration Statement, as filed with the Securities and
       Exchange Commission on December 21, 1981.

   3.  Incorporated by reference to Exhibit 3.1 of Registrant's Exhibits to
       Form S-18 Registration Statement, as filed with the Securities and
       Exchange Commission on December 21, 1981.

   4.  Incorporated by Reference to Exhibit 9.1 of Registrant's Exhibits to
       Form S-18 Registration Statement, as filed with the Securities and
       Exchange Commission on December 21, 1981.

   5.  Incorporated by reference to Exhibit 9.2 of Registrant's Exhibits to
       Post-Effective Amendment No. 1 to Form S-18 Registration Statement, as
       filed with the Securities and Exchange Commission on March 11, 1982.

   6.  Incorporated by reference to Exhibit 9.4 of Registrant's Exhibits to
       Post-Effective Amendment No. 1 to Form S-18 Registration Statement, as
       filed with the Securities and Exchange Commission on March 11, 1982.

                                     -37-
<PAGE>

   7.  Incorporated by reference to Exhibit 10.4 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1983.

   8.  Incorporated by reference to Exhibit 10.6 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1984.

   9.  Incorporated by reference to Exhibit 10.9 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1985.

  10.  Incorporated by reference to Exhibit 10.10 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1985.

  11.  Incorporated by reference to Exhibit 10.6 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1987.

  12.  Incorporated by reference to Exhibit 10.9 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1989.

  13.  Incorporated by reference to Exhibit 10.10 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1989.

  14.  Incorporated by reference to Exhibit 10.11 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1989.

  15.  Incorporated by reference to Exhibit 10.12 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1989.

  16.  Incorporated by reference to Exhibit 10.13 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1989.

  17.  Incorporated by reference to Exhibit 2.2 of Registrant's Exhibits
       to Form S-18 Registration Statement, as filed with the Securities
       and Exchange Commission on December 21, 1981.

  18.  Incorporated by reference to Exhibit 10.15 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1993.

  19.  Incorporated by reference to Exhibit 10.16 of Registrant's Annual
       Report on Form 10-K for the fiscal year ended December 31, 1993.

(b)  REPORTS ON FORM 8-K

     None.

                                     -38-
<PAGE>

                             WEIGHTED AVERAGE SHARES
                      TWELVE MONTHS ENDED DECEMBER 31, 1997

                                                         BASIC      DILUTED

A. COMMON STOCK                                 ANNUAL 430230.94  430230.94
                                             (4TH QTR) 435587.00  435587.00

<TABLE>
<CAPTION>

                                  NO OF
                                   DAYS
                                 ------
   <S>              <C>          <C>     <C>
   433209.00 12-31-96(BAL FWD)
   433209.00        TO 1-06-97     6.00    2599254.00
   432109.00        TO 1-14-97     8.00    3456872.00
   429224.00        TO 4-14-97    89.00   38200936.00
   427675.00        TO 8-11-97   120.00   51321000.00
   427565.00        TO 9-25-97    45.00   19240425.00
   426565.00        TO 9-29-97     4.00    1706260.00
   435565.00       TO 12-30-97    91.00   39636415.00
   436565.00         TO 1-1-98     2.00     873130.00
                                 ------  ------------
                                 365.00  157034292.00
</TABLE>

   AVERAGE SHARES OUTSTANDING
      FOR THE YEAR                          430230.94

   AVERAGE SHARES OUTSTANDING
      FOR THE 4TH QUARTER                   435587.00

<TABLE>
<CAPTION>

             OPTIONS-DILUTED
             -----------------
             AVERAGE PRICE FOR THE YEAR        39.130              29084.34
                                         -------------
       NO OF          YEAR END    OPTION        NO OF
      SHARES             PRICE     PRICE        SHARES
   --------- ----------------- --------- -------------
<S>                     <C>        <C>          <C>
MZ   1000.00            39.130     10.00           744
SN  15689.00            39.130     10.00        11,680
SN   8333.00            39.130     12.00         5,778
MZ   2900.00            39.130     13.50         1,899
TW    400.00            39.130     12.25           275
SN    978.00            39.130     13.25           647
DD   2500.00            39.130     13.00         1,669
MZ   1045.00            39.130     13.00           698
AC    400.00            39.130     13.00           267
TW   1500.00            39.130     13.00         1,002
SN   4000.00            39.130     17.75         2,186
MZ   2000.00            39.130     17.75         1,093
DD   1000.00            39.130     17.75           546
TW   1000.00            39.130     17.75           546
AC    100.00            39.130     17.75            55

</TABLE>

                                   -39-
<PAGE>

<TABLE>
<CAPTION>

<S>                             <C>          <C>
TOTAL SHARES 4TH QUARTER         468816.74    464671.34

TOTAL SHARES YEAR-TO-DATE        430230.94    459315.28

NET INCOME 4TH QUARTER          $  473,828   $  473,828

NET INCOME YEAR TO DATE, 1997   $1,708,154   $1,708,154

EARNINGS PER SHARE 4TH QUARTER  $    1.011   $    1.020

EARNINGS PER SHARE, YTD         $    3.970   $    3.719

</TABLE>

                                    -40-


<PAGE>

SIGNATURES

    Pursuant to the requirements of Section 13 of the Securities Exchange
    Act of 1934, the Registrant has duly caused this Report to be signed
    on its behalf by the undersigned, thereunto duly authorized.

                                SUMMIT BANCSHARES, INC.

Date: March 28, 1998            By: ------------------------
                                    Shirley W. Nelson, Chief
                                    Chairman and CEO
                                    (Principle Executive Officer)

Date: March 28, 1998            By: ------------------------
                                    Kikuo Nakahara
                                    (Chief Financial Officer)

    KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears 
below constitutes and appoints SHIRLEY W. NELSON and KIKUO NAKAHARA, and each 
or any one of them, as his or her true and lawful attorney-in-fact and agent, 
with full power of substitution and resubstitution, for him or her and in his 
or her name, place and stead, in any and all capacities, to sign any and all 
amendments to this Report, and to file the same, with all exhibits thereto 
and other documents in connection therewith, with the Securities and Exchange 
Commission, granting unto said attorney-in-fact and agents, and each of them, 
full power and authority to do and perform each and every act and thing 
requisite and necessary to be done in and about the premises, as fully to all 
intents and purposes as he or she might or could do in person, hereby 
ratifying and confirming all that said attorney-in-fact and agents or any of 
them, or their substitutes or substitute, may lawfully do or cause to be done 
by virtue hereof.

    Pursuant to the requirements of the Securities and Exchange Act of 1934, 
this Report has been executed in Oakland, California, by the following 
persons on behalf of the Registrant on the capacities and on the dates 
indicated.

                                     -41-                        

<PAGE>

     SIGNATURE                      TITLE                   DATE
     ---------                      -----                   ----

SHIRLEY W. NELSON             Chairman of the Board,        March 18, 1998
- ------------------            Chief Executive Officer       --------------
SHIRLEY W. NELSON             and President
                              

KIKUO NAKAHARA                Chief Financial               March 18, 1998
- ---------------               Officer and Director          --------------
KIKUO NAKAHARA                

GEORGE H. HOLLDIGE            Secretary and Director        March 18, 1998
- ------------------                                          --------------
GEORGE H. HOLLIDGE

JERRALD R. GOLDMAN, M.D.      Director                      March 18, 1998
- ------------------------                                    --------------
JERRALD R. GOLDMAN

THOMAS H. STATE               Director                      March 18, 1998
- ---------------                                             --------------
THOMAS H. STATE

MARY C. WARREN                Director                      March 18, 1998
- --------------                                              --------------
MARY C. WARREN

BARBARA J. WILLIAMS           Director                      March 18, 1998
- -------------------                                         --------------
BARBARA J. WILLIAMS

                                     -42-                        


<PAGE>

                                    [LOGO]

                           OFFICE SERVICE AGREEMENT

This Agreement is dated October 8, 1997 and is entered into in Pleasanton, CA 
by and between Rostex, Inc., dba HQ Business Centers (hereinafter "HQ") and 
Summit Bank (hereinafter "Client").

HQ and Client agree that HQ shall grant to Client for and in consideration of 
the agreements and fee(s) set forth herein, a license to use the Office(s) as 
from time to time designated by HQ and, in common with HQ's other clients, a 
license to use HQ's Business Center facilities and services, in accordance 
with the terms hereof.

1.   BASIC TERMS.  This Section 1 contains the basic terms of this Agreement 
and all provisions of this Agreement are to be read in accord therewith:

     A.  Base Services: HQ's Complete Executive Office Program, including the 
     use of executive offices complete with professional administrative 
     staff, telephone answering and such other inclusive services as defined 
     in Schedule "A".

     B.  Additional Services: Access to additional business services for 
     purchase as needed by Client, including secretarial, administrative, 
     telecommunications support and such other services are as defined in 
     Schedule "B".

     C.  HQ Business Center  Pleasanton

     D.  Building  5820 Stoneridge Mall Road, Pleasanton, CA 94588

     E.  Office [(number(s)]  23 having a maximum occupancy of 2 person(s).

     F.  Commencement Date  December 1, 1997

     G.  Initial Term  12 Months

     H.  End of Initial Term  November 30, 1998

     I.  Monthly Base Services Fee  $1669.00

     J.  Refundable Services Retainer  $2503.50

2.   OFFICE.  Client shall, as part of the Base Services, be granted a 
license to use the Office and shall have access to the Office twenty-four 
(24) hours a day, seven (7) days a week. HQ agrees to provide office 
cleaning, maintenance services, electric heating and air conditioning to the 
Office for normal office use in such reasonable quantities and during such 
reasonable hours as shall be determined by HQ or the Building. In addition, 
Client will have reasonable use of HQ common area facilities. Client shall 
use the Office and common areas of the HQ Business Center solely for general 
office use in the conduct of the Client's business.

     If, for any reason whatsoever, HQ is unable to provide use of the Office 
or a mutually agreed upon alternative Office at the time herein agreed, 
Client may either extend the Commencement time herein agreed, Client may 
either extend the Commencement Date until the Office becomes available or, as 
its sole remedy for such failure, cancel and terminate this Agreement if the 
use of the Office is not available to Client within five (5) business days 
after written notice to HQ by Client, in which case any prior payments shall 
be fully refunded. No such failure to provide use of the Office shall subject 
HQ to any liability for loss or damage, nor affect the validity of this 
Agreement or the obligations of the Client hereunder.

     HQ will have the right to relocate Client, AT HQ'S EXPENSE, to another 
office in the HQ Business Center, and to substitute such other office for the 
Office licensed hereby, provided such other office is substantially similar 
in area and configuration to Client's contracted office and provided Client 
shall incur no increase in the Monthly Base Services Fee.

3.   SERVICES. HQ agrees, in consideration of the Monthly Base Services Fee, 
to provide Base Services to Client as described in Schedule "A". From time to 
time during the Term, HQ may, at its option, make other services available to 
Client of the nature described in Schedule "B", at fees that are from time to 
time established by HQ. In the event Client is in default of this Agreement, 
HQ may, at its option, cease furnishing any and all services including 
telephone services.

     Client will not offer to any party in the HQ Business Center or the 
Building, any of the services that HQ provides to its clients including, but 
not limited to, the services described in Schedule "A" or "B".

     HQ will answer all incoming telephone calls, unless otherwise mutually 
agreed, during normal business hours, as determined by HQ. Answering service 
will be limited to normal business communications, excluding inbound 
telemarketing and advertising response which requires pre-approval by HQ and 
shall be subject to fees established from time to time by HQ.

     Client will use only telecommunications systems and services as provided 
by HQ. Client will pay to HQ a monthly equipment rental fee for the use of 
each telephone instrument and voice lines. In the event HQ discontinues the 
offering of long distance service, Client will provide its own long distance 
service through a locally accessed long distance carrier.

     Client acknowledges that due to the imperfect nature of verbal, written 
and electronic communications, neither HQ nor any of its officers, directors, 
employees, shareholders, partners, agents or representatives shall be 
responsible for damages, direct or consequential, that may result from the 
failure of HQ to furnish any service, including but not limited to the 
service of conveying messages, communications and other utility or services 
required under this Agreement or agreed to by HQ. Client's sole remedy and 
HQ's sole obligation for any failure to render any service, any error or 
omission, or any delay or interruption with respect thereto, is limited to an 
adjustment to Client's billing in an amount equal to the charge for such 
service for the period during which the failure, delay or interruption 
continues.

     CLIENT EXPRESSLY WAIVES, AND AGREES NOT TO MAKE ANY CLAIM FOR DAMAGES, 
DIRECT OR CONSEQUENTIAL, ARISING OUT OF ANY FAILURE TO FURNISH ANY UTILITY, 
SERVICE OR FACILITY, ANY ERROR 

                                  Page 1 of 6  -C- 1995 HQ NETWORD SYSTEMS INC.


<PAGE>

OR OMISSION WITH RESPECT THERETO, OR ANY DELAY OR INTERRUPTION OF THE SAME.

4.   DURATION OF AGREEMENT.  Upon the End of Initial Term, or any extension 
thereof, the term of this Agreement and the license herein granted shall be 
automatically extended for the same period of time as the Initial Term, upon 
the same terms and conditions as contained herein, unless either party gives 
notice to the other in writing to the contrary at least sixty (60) days prior 
to the End of Initial Term (90 days if Client has licensed the use of three 
or more offices).

     Tenant hereby agrees to pay HQ, the total monthly rent for each full 
month, or part thereof, in which the tenant occupies the premises. Tenant is 
deemed to occupy the premises during the required notice period herein, 
whether or not tenant is physically in the premises. (Eg: 30 day notice 
presented on the 15th day of month 1 requires payment of total monthly rent 
for month 2).

     Upon any termination of this Agreement, whether by lapse of time or 
otherwise, or upon any revocation of Client's license herein granted, the 
Client shall cease all use of the Office, the HQ Business Center and all 
services immediately. For each and every month or portion thereof that Client 
continues use of the Office after the termination of this Agreement by lapse 
of time or otherwise, without the express written consent of HQ, Client shall 
pay HQ an amount equal to double the Monthly Base Services Fee computed on a 
per-month basis for each month or portion thereof that Client continues the 
use of the Office.

5.   PAYMENTS AND ESCALATIONS.  Client agrees to pay to HQ the Monthly Base 
Services Fee plus applicable sales or use taxes, in advance, on the first day 
of each calendar month during the Initial Term and all extensions thereof, 
without any deduction, offset, notice or demand. If the Commencement Date 
shall be other than the first day of a month or end of the last day of a 
month, fees for any such month shall be prorated. Charges for any Schedule 
"B" service purchased by Client from HQ shall be due and payable on the 10th 
of the month following the offer for any such service.

     One year after the Commencement Date of this Agreement and each and 
every anniversary date thereafter, the Monthly Base Service Fee will 
automatically increase by FOUR PERCENT (4%) of the Monthly Base Services Fee 
due for the month preceding such anniversary date.

     All Monthly Base Services Fees and other sums payable hereunder shall be 
payable at the office of HQ or at such other location or to any agent 
designated in writing by HQ. In addition to any other sums due, Client shall 
pay monthly late charges equal to five percent (5%) of all amounts that have 
not been paid to HQ within five (5) days of their respective due dates. The 
parties agree that such late charges are fair and reasonable compensation for 
costs incurred by HQ where there is default in any payment due under this 
Agreement.

     Upon the execution of this Agreement, Client shall pay HQ or its agent 
the Refundable Services Retainer. The Refundable Services Retainer need not 
be kept separate and apart from other funds of HQ, no interest shall be paid 
thereon, and may be used by HQ to provide Schedule "A" and "B" services under 
this Agreement. In addition to the Refundable Services Retainer, Client will, 
upon execution hereof, pay to HQ the Monthly  Base Services Fee for the first 
full month of the Initial Term.

     Client agrees that the Refundable Services Retainer shall not be used by 
Client as payment for the Monthly Base Services Fee for the last month of the 
Initial Term, or any extension thereof, in the event Client defaults in the 
performance of any of the terms hereof, HQ may terminate this Agreement and 
the license herein granted and may also use, apply or retain the whole, or 
any part, of the Refundable Services Retainer for the payment of any service 
fee or any other payment due hereunder, or for payment of any other sum that 
HQ may spend by reason of Client's default. If Client shall, at the end of 
the term of this Agreement, have fully and faithfully complied with all of 
the terms and provisions of this Agreement, and surrendered all keys, access 
cards and building passes, the Refundable Services Retainer, or any balance 
thereof, shall be returned to Client within forty-five (45) days thereafter.

6.   DAMAGES AND INSURANCE.  Client will not damage or deface the furnishings, 
walls, floors or ceilings, nor make holes for the hanging of pictures or make 
or suffer to be made any waste, obstruction or unlawful, improper or 
offensive use of the Office or the common area facilities. Client will not 
cause damage to any part of the Building or the property of HQ or disturb the 
quiet enjoyment of any other licensee or occupant of the Building. At the 
termination of this Agreement, the Office shall be in as good condition as 
when Client commenced the use thereof, normal wear and tear excepted. Client 
agrees to pay for repainting each Office used less than twelve (12) months by 
Client, at a cost not to exceed One Hundred Fifty Dollars ($150.00) per 
Office. HQ will have the right, at any time and from time to time, to enter 
the Office to inspect the same, to make such repairs and alterations as HQ 
reasonably deems necessary, and the cost of any such repair resulting from 
the act or omission of Client shall be reimbursed to HQ by Client upon 
demand. HQ shall have the right to show the Office to prospective Clients, 
provided HQ will use reasonable efforts not to disrupt Client's business.

     HQ and its respective directors, licensors, officers, agents, servants 
and employees shall not, to the extent permitted by law, except upon the 
affirmative showing of HQ's gross negligence or willful misconduct, be liable 
for, and Client waives all right of recovery against such entities and 
individuals for any damage or claim with respect to any injury to person or 
damage to, or loss or destruction of any property of Client, its employees, 
authorized persons and invitees due to any act, omission or occurrence in or 
about the HQ Business Center or the Building. Without limitation of any other 
provision hereof, each party hereto hereby agrees to indemnify, defend and 
hold harmless the other party hereto, and such other party's officers, 
directors, employees, shareholders, partners, agents and representatives from 
and against any liability to third parties arising out of, in the case of 
Client as an indemnifying party, Client's use and occupancy of the Office or 
any negligent act or omission of Client or Client's officers, directors, 
employees, shareholders, partners, agents, representatives, contractors, 
customers or invitees and, in the case of HQ as an indemnifying party, any 
act or omission constituting gross negligence or willful misconduct of HQ or 
HQ's officers, directors, employees, shareholders, partners, agents or 
representatives. Subject to the foregoing, Client assumes all risk of loss 
with respect to all personal property of Client, its agents employees, 
contractors, and invitees, within or about the HQ Business Center or the 
Building. Client acknowledges that it is the Client's responsibility to 
maintain insurance to cover the risks set forth in this paragraph.

     HQ and Client each hereby waive any and all rights of recovery against 
the other, or against the directors, licensors, officers, agents, servants 
and employees of the other, for loss of or damage to its property or the 
property of others under its control, to the extent such loss or damage is 
covered by any insurance policy.

     If the HQ Business Center is made unusable, in whole or in part, by fire 
or other casualty not due to negligence of Client, HQ may, at its option, 
terminate the Agreement upon notice to Client, effective upon such casualty, 
or may elect to repair, restore or rehabilitate, or cause to be repaired, 
restored or rehabilitated, the HQ Business Center, without expense to Client, 
within ninety (90) days or within such longer period of time as may be 
required because of events beyond HQ's control. The Monthly Base Services Fee 
shall be abated on a per diem basis for the portions of the Office that are 
unusable.

7.   DEFAULT.  Client shall be deemed to be in default under this Agreement: 
(a) if Client defaults in the payment of the Monthly Base Services Fee or 
other sums due hereunder or (b) if Client defaults in the prompt and full 
performance of any other provision of this Agreement and any such default 
continues in excess of five (5) business days after written notice by HQ.

     Should Client be in default hereunder, HQ shall have the option to 
pursue any one or more of the following remedies 

                                  Page 2 of 6  


<PAGE>

without any additional notice or demand whatsoever and without limitation to 
HQ in the exercise of any remedy.

     (1)  HQ may, if HQ so elects, without any additional notice of such 
election or demand to Client, either forthwith terminate this Agreement and 
the license to use any portion of the HQ Business Center, and may enter into 
the Office and take and hold possession of the contents thereof, without 
releasing Client, in whole or in part, from the Client's obligations 
hereunder. In the event of such termination, HQ may, at its option, declare 
the entire amount of the Monthly Base Services Fee which would become due 
and payable during the remainder of the term, to be due and payable 
immediately, in which event, Client agrees to pay the same at once.

     (2)  Pursue any other remedy now or hereafter available to HQ. HQ's 
exercise of any right or remedy shall not prevent it from exercising any 
other right or remedy.

     Client agrees to pay all costs and expenses, including reasonable 
attorneys' fees, expended or incurred by HQ in connection with the 
enforcement of this Agreement, the collection of any sums due hereunder, any 
action for declaratory relief in any way related to this Agreement, or the 
protection or preservation of any rights of HQ hereunder.

     8. RESTRICTION ON HIRING.  Client agrees that during the term of this 
Agreement and within one (1) year of the termination of this Agreement, 
neither Client nor any of its principals, employees or affiliates will hire 
directly or as an independent contractor, any person who is at that time, or 
was during the term of this Agreement, an employee of HQ. In the event of a 
breach of any obligation of Client contained in this paragraph. Client shall 
be liable to HQ for, and shall pay to HQ, on demand, liquidated damages in 
the sum of $10,000.00 for each employee with respect to whom such breach 
shall occur, it being mutually agreed that the actual damage that would be 
sustained by HQ as the result of any such breach would be, from the nature of 
the case, extremely difficult to fix and that the aforesaid liquidated damage 
amount is fair and reasonable.

     9. MISCELLANEOUS.

     A. This is the only Agreement between the parties. No other agreements 
are effective. All amendments to this Agreement shall be in writing and 
signed by all parties. Any other attempted amendment shall be void. The 
invalidity or unenforceability of any provision hereof shall not affect the 
remainder hereof.

     B. All waivers must be in writing and signed by the waiving party. HQ's 
failure to enforce any provision of this Agreement or its acceptance of fees 
shall not be a waiver and shall not prevent HQ from enforcing any provision 
of this Agreement in the future. No receipt of money by HQ shall be deemed to 
waive any default of Client or to extend, reinstate or continue the term 
hereof.

     C. All Schedules and Addenda attached hereto are hereby incorporated 
herein by this reference. The laws of the State in which the HQ Business 
Center is located shall govern this Agreement.

     D. All parties signing this Agreement as a partnership or co-signing 
individuals shall be jointly and severally liable for all obligations of 
Client.

     E. Client represents and warrants to HQ that there are no agents, 
brokers, finders or other parties except _____________ with whom Client has 
dealt who are or may be entitled to any commission or fee with respect to 
this Agreement.

     F. Neither Client nor anyone claiming by, through or under Client shall 
assign this Agreement or permit the use of any portion of the HQ Business 
Center by any person other than Client; provided, however, Client may assign 
this Agreement to an affiliated corporation of Client. In the event of any 
such permitted assignment, Client shall not thereby be relieved of any of its 
obligations under this Agreement.

     G. The Rules and Regulations of the Building and of HQ as defined on 
Schedule "C" hereto and any additional schedules that may be attached hereto 
are expressly made a part of this Agreement and Client expressly covenants 
and agrees to abide by all of such Rules and Regulations and such additional 
terms, as well as such reasonable modifications to such Rules and Regulations 
as may be hereafter adopted by HQ.

     H. All notices hereunder shall be in writing. Notices to Client shall be 
deemed to be duly given if mailed by registered or certified mail, postage 
prepaid, addressed to Client at:

     Summit Bank
     2969 Broadway
     Oakland, CA 94611

     Notice to HQ shall be deemed to be duly given if mailed by registered or 
certified mail, postage prepaid, to HQ at the Building and as follows:

     HQ Pleasanton
     5820 Stoneridge Mall Road, Suite 100
     Pleasanton, CA 94588

     I.  THIS AGREEMENT IS NOT INTENDED TO CREATE A LEASE OR ANY OTHER 
INTEREST IN REAL PROPERTY IN FAVOR OF THE CLIENT, BUT MERELY CREATES A 
REVOCABLE LICENSE IN ACCORDANCE WITH THE TERMS HEREOF. This Agreement grants 
Client the license to use the HQ Business Center and the Office for the 
specific purposes herein set forth without diminution of the legal possession 
or control thereof by HQ and shall be revocable at the option of HQ upon the 
destruction of the HQ Business Center or the breach by Client of any term or 
condition herein set forth. This Agreement is subject and subordinate to any 
underlying lease or contract of the Building or of the premises comprising 
the Office or the HQ Business Center as such lease or contract may be amended 
from time to time (such underlying lease or contract together with any 
amendments, is hereinafter referred to as the "Master Lease"). This agreement 
shall terminate simultaneously with the termination of the HQ Business Center 
operation for any reason. Client is not a party to nor shall Client have any 
rights under the Master Lease.

     J.  Client acknowledges that HQ Business Centers will comply with U.S. 
Postal Service regulations regarding Client mail and, upon termination of 
this Agreement, it will be Client's responsibility to notify all parties of 
termination of the use of the above described address, assigned telephone 
number, telex and facsimile numbers. For a period of thirty (30) days after 
the termination of this Agreement, HQ will, at Client's written request and 
cost, provide Client's new telephone number and address to all incoming 
callers and will hold or forward to Client once a week all mail, packages, 
facsimiles and telexes.

     K.  HQ may assign this Agreement and/or any fees hereunder and Client 
agrees to attorn to any such assignee.

                                  Page 3 of 6  



<PAGE>

                        HQ

      Rostex, Inc., dba HQ Business Centers
- -------------------------------------------------

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


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

A(n)  California Corporation
    ---------------------------------------------

By:   S. Kermabon
    ---------------------------------------------


      Sylvia J. Kermabon
    ---------------------------------------------

Its:  Center Manager
    ---------------------------------------------


                   CLIENT

CORPORATION:  Summit Bank
            -------------------------------------

A(n)      [ILLEGIBLE]                 Corporation
    ---------------------------------------------

By:       [ILLEGIBLE]
    ---------------------------------------------

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

Its:      [ILLEGIBLE]
    ---------------------------------------------

PARTNERSHIP: ------------------------------------

A(n)                                  Partnership
    ---------------------------------------------

By: ---------------------------------------------

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

Its: General Partner

INDIVIDUALS:

    ---------------------------------------------
                   (signature)

    ---------------------------------------------
                   (print name)

Address: ----------------------------------------

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

    ---------------------------------------------
                    (signature)

    ---------------------------------------------
                    (print name)

Address: ----------------------------------------

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

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

PERSONAL GUARANTEE:

For value received, the undersigned does hereby unconditionally and 
irrevocably guarantee the prompt payment and full performance of all terms, 
covenants, conditions and agreements as contained herein.

BY: --------------------- BY: ---------------------- BY: ----------------------

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

SCHEDULE "A"
BASE SERVICES: see attached - Schedule "A"
in Addition to the following:

- -  Individual Executive Office

- -  Professional Receptionist, Message Center Secretaries, and Office Manager

- -  Prestigious Business Address

- -  Business Identity on Building Lobby Directory

- -  Facsimile Number for Client's Use

- -  Mail and Package Receipt

- -  Utilities and Janitorial Service

- -  Building Operating Expenses

SCHEDULE "B"
ADDITIONAL SERVICES

Secretarial Services and Errands
Binding Services
Postage for Outgoing Mail (plus 20%)
Express Delivery Services (plus 20%)
UPS Services (plus 20%)
Mail Reads and Mail Checks
Handling all Pick-up and Deliveries
Paging and Cross Connecting
Specialized Telephone Services
Specialized Equipment Rental
Printing
Office Supplies
Miscellaneous Purchasing Services
Catering
Local and Long Distance Telephone Services
Other Tenant Requested Services

                                  Page 4 of 6  



<PAGE>

<TABLE>
<CAPTION>
                                                  FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------------------
FOR THE YEAR ENDED               1997         1996          1995         1994         1993
- --------------------------------------------------------------------------------------------
<S>                          <C>           <C>           <C>           <C>          <C>
Net Income                   $1,708,154    $1,411,871    $1,315,507    $907,603     $846,771
Earnings per common share         $3.97         $3.32         $3.10       $2.19        $2.03
Earnings per common share -
  assuming dilution               $3.72         $3.11         $2.87       $2.08        $1.99
Cash Dividends per Share,
  declared                        $1.50         $1.50         $1.50       $0.49        $0.24

AT YEAR END (IN THOUSANDS)
- --------------------------------------------------------------------------------------------
Deposits                     $   90,432    $   80,510    $   75,251    $ 67,862     $ 70,462
Loans (Net)                      60,833        51,408        49,645      46,691       50,541
Assets                          104,342        92,946        86,822      78,601       80,356
Shareholders' Equity             12,879        11,939        11,102      10,494        9,626
Non-performing Loans to
     Total Loans                   0.96%         0.00%         0.82%       1.66%        1.88%
Allowance to
     Non-performing Loans           212%          N/A           252%        120%          75%

Allowance to
     Non-performing Assets           68%           82%           60%         26%          29%

Tier 1 Capital                    13.71%        14.41%        12.19%      13.33%       11.55%
Total Tier                        14.92%        15.61%        13.29%      14.44%       12.66%
Leverage Ratio                     9.12%         9.63%         9.24%      10.40%        8.95%

</TABLE>

<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS 
OF OPERATIONS

The matters addressed in this Annual Report, with the exception of the 
historical information presented, may incorporate certain forward-looking 
statements involving risks and uncertainties, including the risks discussed 
under the heading "Certain Factors That May Affect Future Results" and 
elsewhere in this Report.

This section is a review of Summit Bancshares, Inc.'s (the Company) results 
as reflected in the Consolidated Financial Statements.  It discusses the 
principal items of income and expense and the factors affecting the Company's 
financial position.  This discussion should be read together with the 
Selected Financial Data and Consolidated Financial Statements included 
elsewhere in the Annual Report. 

The Company's wholly owned subsidiary, Summit Bank (the "Bank"), has 
conducted the business of a commercial bank since 1982. It provides 
commercial credit and various checking and savings account products for small 
and midsized businesses and for professionals as well as individual consumers.

SUMMARY OF EARNINGS 

The Company's net income for 1997 was $1,708,000 compared to $1,412,000 in 
1996 and $1,316,000 in 1995. The increase  in 1997 net income from 1996 is 
attributed to an increase in higher yielding assets brought about by an 
increase in loans and improved interest margins.  The increase in 1996 net 
income from 1995 was mainly attributed to a decrease in the provision for 
loan losses due to improved loan quality. The net income of $1,708,000 for 
1997 represents $3.72 per share earnings, compared to $3.11 per share in 1996 
and $2.87 per share in 1995.

<PAGE>

NET INTEREST INCOME 

The primary source of income for the Company is Net Interest Income or "Gross 
Margin" which is the difference between interest earned on loans and 
investments and interest paid on deposits and other liabilities.  In general, 
net interest income is affected by a change in interest rates.  As interest 
rates rise or fall, so will the Company's net interest income, excluding 
changes in total assets.  The primary reasons for this is that the Company's 
investment portfolio earns income on a fixed interest rate basis while a 
majority of the lending portfolio earns income on a floating interest rate 
basis.  In addition, all investments are held to maturity and 61% of the 
investment portfolio matures in one year.  Regarding loans, approximately 59% 
of the loans outstanding mature within one year, while the longest maturity 
is twenty-five years.  In a declining interest rate environment interest 
income on loans will generally decline faster than the investment income and 
vice versa.  To offset any decline in interest income due to a declining 
interest rate environment, the Company monitors closely its interest expense 
on deposits.  Of the total time certificates of deposit outstanding at year 
end, all but 1% mature within one year while 65% mature within 90 days.  Thus 
the Company is able to minimize the effects of a declining interest rate 
environment by repricing these instruments on a more frequent basis than if 
the average maturity were longer than 1 year.  

Net interest income for 1997 was $6,457,000, an increase of 18.7% over the 
$5,439,000 posted in 1996, and as compared to $5,464,000 in 1995. The 
increase in 1997 was primarily the result of an increase in the average prime 
rate, which increased from 8.25% in 1996 to 8.44% in 1997.  Average earning 
assets increased 11.2%from $78,107,000 in 1996 to $86,830,000 in 1997; 
average total deposits also increased 11.2% from $74,752,000 in 1996 to 
$83,091,000 in 1997, and as compared to $68,492,000 in 1995. $4,475,000 of 
the 1997 increase was centered in interest bearing accounts.

<PAGE>

The decrease in 1996 was primarily the result of a decrease in the average 
prime rate, which decreased from 8.85% in 1995 to 8.25% in 1996.  Average 
earning assets increased 9.6% from $71,245,000 in 1995 to $78,107,000 in 
1996; average total deposits also increased 9.1% from $68,492,000 in 1995 to 
$74,752,000 in 1996, and as compared to $68,022,000 in 1994.  $3,123,000 of 
the 1996 increase was centered in interest bearing accounts.

Average loans outstanding increased by 19.8% in 1997 to $57,906,000 as 
compared to $48,355,000 in 1996 and $47,083,000 in 1995. Average outstanding 
investments decreased  3.5% to $28,924,000 in 1997 as compared to $29,989,000 
in 1996 and $24,222,000 in 1995. The average loan to deposit ratio increased 
in 1997 to 69.7% as compared to 65.2% in 1996 and 67.2% in 1995.  The yield 
on average earning assets was 9.7% in 1997 as compared to 9.3% in 1996 and 
9.8% in 1995.

Interest expense increased 26% to $1,940,000 in 1997 from $1,938,000 in 1996 
and $1,536,000 in 1995.  Average interest-bearing deposits increased 9.1% in 
1997 to $57,512,000 as compared to $52,715,000 in 1996 and $48,599,000 in 
1995 and were primarily centered in the market rate accounts.  Average 
non-interest bearing deposits increased 14.7% in 1997 to $25,278,000 as 
compared to $22,037,000 in 1996 and $19,893,000 in 1995.  Overall cost of 
funds in 1997 was 2.6% as compared to 2.5% in 1996 and 3.2% in 1995.

NON-INTEREST INCOME AND EXPENSE

Non-interest income, consisting primarily of service charges on deposit 
accounts, and other customer fees and charges including rents, was $516,000 
in 1997, a decrease from $539,000 in 1996 and $550,000 in 1995.  Total 
service charge income from deposit accounts decreased by 2.2% from $311,000 
in 1996 to $304,000 in 1997, while total income from other charges decreased 
7.4% from $228,000 in 1996 to $211,000 in 1997.  This compares to 1995 
figures of $368,000 in deposit accounts income and $181,000 in income from 
other charges.  The deposit income decrease in 1997 resulted primarily from a 
decrease in service charges related to 

<PAGE>

analysis, which were $12,000 less than 1996 receipts.  The decrease in other 
income charges in 1997 was related to a $14,000 decrease in wire transfer 
fees.

The deposit income decrease in 1996 was primarily related to a decrease in 
service charges related to return check charges which was $31,000 less than 
1995 receipts and decrease in income from service charges on demand deposit 
accounts. The increase in other income charges in 1996 was related to a 102% 
increase in wire transfer fees due to volume and charges on early withdrawal 
penalties.

Non-interest expenses increased 9.6% to $3,738,000 in 1997, from $3,408,000 
in 1996 and $3,355,000 in 1995. Salary expense increased 12.4% from 
$1,878,100 in 1996 to $2,111,000 in 1997, and was due to normal staffing 
needs and an increase in profit-sharing and 401(k) contributions.  In 
addition, business development and entertainment expense increased from 
$78,000 in 1996 to $111,000 in 1997, which was due to an aggressive sales 
program.  Foreclosures and OREO expense increased from $85,000 to $129,000, 
primarily due to a write-down of $75,000 on one of the Bank's properties.  
Marketing expense increased from $8,000 in 1996 to $46,000 in 1997, primarily 
due to changes in the Bank's marketing brochures. This was also a primary 
factor in the increase in postage expense from $37,000 in 1996 to $56,000 in 
1997.  Offsetting these increases were decreases in audit and accounting 
expenses, which went from $46,000 in 1996 to $39,000 in 1997.  In addition, 
consulting fees decreased from $99,000 in 1996 to $84,000 in 1997. Legal 
expenses also decreased from $127,000 in 1996 to $41,000 in 1997.

The non-interest expense increase in 1996 can be attributed to a 5.2% 
increase in salary expense from $1,786,000 in 1995 to $1,878,000 in 1996 and 
was due to normal staffing needs.  In addition, director fees increased from 
$76,000 in 1995 to $103,000 in 1996,  which is comparable to fees paid to 
directors of other banks of a similiar size, and consulting fees which 
increased from $78,000 in 1995 to $99,000 in 1996 and was due to the 
implementation of a sales culture program for all bank 

<PAGE>

calling officers.  These increases where partially offset by the decrease in 
FDIC assessment which decrease from $84,000 in 1995 to $2,000 in 1996 and a 
decrease in foreclosure expense related to the carrying value of foreclosed 
properties.

The Bank's allowance for loan losses as a percent of loans was 2.0% and 2.1% 
as of December 31, 1997 and 1996, respectively. The average in the industry 
for banks our size is approximately 1.83%. Total gross loans charged off in 
1997 were $105,000 compared to $83,000 in 1996 and $334,000 in 1995.

PROVISION FOR INCOME TAXES

The provision for income taxes reflects a combined Federal and California 
effective tax rate of 42.4% in 1997, compared to 41.2% in 1996 and 41.4% in 
1995, as described in Note 6 to the Financial Statements.

LIQUIDITY AND CAPITAL 

Liquidity is defined as the ability to meet present and future obligations 
either through the sale or maturity of existing assets or by the acquisition 
of funds through liability management.  Additionally, the Bank's investment 
portfolio is managed to provide liquidity as well as appropriate rates of 
return.  It is the Company's practice to hold securities until maturity 
rather than actively trade its portfolio.  As of December 31, 1997 the 
Company had $21,574,000 in cash and cash equivalents compared to $19,169,000 
as of December 31, 1996, and $16,428,000 as of December 31, 1995.  The ratio 
of net loans to deposits as of December 31, 1997, was 67.3% compared to 63.9% 
as of December 31, 1996, and 66.0% as of December 31, 1995.

The Bank maintains a portion of its assets in loans, time deposits with other 
financial institutions and investments with short-term maturities.  More 
specifically, loans, time deposits with other financial institutions and 
investments due within one year totaled $46,590,000 at December 31,

<PAGE>

1997, as compared to $56,323,000 at December 31, 1996, and $52,455,000 at 
December 31, 1995, which is equivalent to 44.6%, 60.6%, and 60.4% of total 
assets at the corresponding year ends, respectively. During 1997, the Company 
repurchased 6,644 shares of its common stock for a total price of $221,198. 
The Company plans to continue its repurchase program as an additional avenue 
for liquidity for its  shareholders as long as it is economically appropriate 
to do so.  The program has not affected the Company's liquidity or capital 
positions or its ability to operate as the Company's capital growth has 
exceeded its asset growth.  In addition, the Company's subsidiary Bank 
remains more than well capitalized under current regulatory requirements.

CREDIT CONCENTRATION

A part of the subsidiary Bank's marketing strategy is to offer quality 
financial services to the professional and small business communities. The 
Company has been especially successful in targeting health care 
professionals. 

This segment has traditionally provided high levels of deposits and low loan 
losses.  While approximately 11.8% of the Company's loans are concentrated 
with health care professionals, the Bank has had only two charge-offs related 
to this business segment totaling $133,206 since it was founded in 1982.  
Health care reform has received close scrutiny over the past few years as the 
Clinton administration continues to attempt to restructure the method by 
which health care is provided to the public.  To date it appears that such 
reform is not likely to occur in the immediate future.  However, over the 
past few years, the doctors and health care providers in the Company's 
communities have been adjusting to the emerging trends in this industry. This 
includes higher percentages of patients on Medicare; closer scrutiny from 
insurance carriers; and movement to managed care and "capitation" contracts.  
Through this process, the Company has not experienced any noticeable 
deterioration in credit quality. The Company cannot predict the ultimate 
outcome of health care reform.  However, the Company closely  monitors the 
status of 

<PAGE>

reform and considers the potential impact of any reform on its current 
customers and its underwriting of loans to healthcare professionals.

NON-PERFORMING ASSETS

The increase in non-performing assets from December 31, 1996, to December 31, 
1997 is due primarily to an increase in loans 90 days or more past due and 
still accruing and non-accrual loans.  Other real estate owned consists of 3 
vacant land parcels in the California counties of Alameda and Contra Costa.   
All properties are being actively marketed. Current comparables favor a 
complete recovery at the time of sale. At December 31, 1997, three loans were 
on non-accrual status.

CERTAIN FACTORS THAT MAY AFFECT FUTURE RESULTS

The primary factor which may affect future results is the fluctuation of 
interest rates in the market place more commonly referred to as interest rate 
risk.  Interest rate risk is the exposure of a bank's current and future 
earnings and equity capital arising from adverse movements in interest rates. 
It results from the possibility that changes in interest rates may have an 
adverse effect on a bank's earnings and its underlying economic value.  
Changes in interest rates affect a bank's earnings by changing its net 
interest income and the level of other interest-sensitive income and 
operating expenses.  As mentioned previously, the potential decrease in a 
declining interest rate environment would be minimized by an increase in 
assets. In addition, earnings and growth of the company are and will be 
affected by general economic conditions, both domestic and international, and 
by monetary and fiscal policies of the United States Government, particularly 
the Federal Reserve Bank.

MARKET PRICE OF THE COMPANY'S STOCK AND DIVIDENDS

According to the Company's records, there were 314 record holders of its stock
at December 31, 1997.  The following table reflects the cash dividends declared
as well as the high and low bid prices which were 

<PAGE>

obtained from the Market Maker.  These prices reflect retail mark-up and may 
not represent actual transactions.

<TABLE>
<CAPTION>

                                                 DIVIDENDS
                            HIGH       LOW       DECLARED
                           -----      ----       ---------
      <S>                  <C>        <C>        <C>
      1997
     
      First Quarter        33-3/4     32-3/4     $   --
      Second Quarter       37-1/2     33-1/8        .75
      Third Quarter        47         37             --
      Fourth Quarter       56         43            .75
      Total                                      $ 1.50
     
     
     
      1996
      First Quarter        28-1/8     26-1/4     $   --
      Second Quarter       29-1/2     28            .75
      Third Quarter        34-1/2     29-1/2         --
      Fourth Quarter       32-3/4     32-1/2        .75
      Total                                      $ 1.50

</TABLE>

The Company presently intends to continue the policy of paying regular 
semi-annual cash dividends.  Future dividends will depend upon the earnings 
of the Company and management's assessment of the future needs for funds.<PAGE>

<PAGE>

MARKET MAKERS

Justin S. Mazzon
American Blue Chip 
Investment Management
700 Larkspur Landing Circle
Larkspur, CA 94939
(415) 925-4322

L. Jack Block
Senior Vice President
Van Kasper & Company
600 California Street, Ste #1700
San Francisco, CA  94108-2704
(415) 954-0689

<PAGE>


        SUMMIT BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED STATEMENTS OF
                  FINANCIAL POSITION DECEMBER 31, 1997 AND 1996

<TABLE>
<CAPTION>
ASSETS                                                                1997             1996
- ----------------------------------------------------------------------------------------------
<S>                                                              <C>              <C>       
Cash and due from banks                                          $  8,664,015     $  7,188,515
Federal funds sold                                                 12,910,000       11,980,000
- ----------------------------------------------------------------------------------------------
Cash and cash equivalents (Note 1)                                 21,574,015       19,168,515
Time deposits with other financial institutions                     5,644,000        9,607,000
Investment securities (fair value of $12,515,656 at
   December 31, 1997 and $8,830,810 at
   December 31, 1996 - Note 2) held to maturity                    12,496,651        8,759,850
Loans, net of allowance for loan losses of
   $1,238,012 at December 31, 1997 and
   $1,070,318 at December 31, 1996 (Notes 3 and 4)                 60,832,859       51,408,038
Other real estate owned (Note 3)                                    1,222,080        1,291,459
Premises and equipment, net (Note 5)                                  872,619          896,856
Interest receivable and other assets                                1,699,307        1,814,083
- ----------------------------------------------------------------------------------------------
TOTAL ASSETS                                                      104,341,531       92,945,801

LIABILITIES AND SHAREHOLDERS' EQUITY
- ----------------------------------------------------------------------------------------------
Deposits:
Demand                                                           $ 31,062,481     $ 27,833,067
Interest-bearing transaction accounts                              33,012,655       28,663,828
Savings                                                             2,264,538        2,665,539
Time certificates $100,000 and over                                18,828,044       15,324,980
Other time certificates                                             5,264,024        6,022,170
- ----------------------------------------------------------------------------------------------
Total Deposits                                                     90,431,742       80,509,584
Interest payable and other liabilities                              1,031,120          497,074
- ----------------------------------------------------------------------------------------------
Total Liabilities                                                  91,462,862       81,006,658

Commitments and contingent liabilities (Note 11)
Shareholders' Equity (Notes 7, 8, 9 and 10):
Preferred Stock, no par value:
   2,000,000 shares authorized, no shares outstanding                       0                0
Common Stock, no par value:
   3,000,000 shares authorized;
   436,565 shares outstanding at December 31, 1997 and
   433,209 shares outstanding at December 31, 1996                  3,709,145        3,830,343

Retained Earnings                                                   9,169,524        8,108,800
- ----------------------------------------------------------------------------------------------
Total Shareholders' Equity                                         12,878,669       11,939,143
- ----------------------------------------------------------------------------------------------
Total Liabilities and Shareholders' Equity                       $104,341,531     $ 92,945,801
- ----------------------------------------------------------------------------------------------

</TABLE>

   The accompanying notes are an integral part of these consolidated 
financial statements.

<PAGE>

<TABLE>
                     SUMMIT BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED STATEMENTS OF
                        INCOME FOR THE YEARS ENDED DECEMBER 31, 1997, 1996, AND 1995
<CAPTION>

                                                   1997               1996              1995
- -----------------------------------------------------------------------------------------------
<C>                                             <C>                <C>               <C>
INTEREST INCOME:
Interest and fees on loans                      $6,726,641         $5,698,998        $5,574,272
Interest on time deposits with other
   financial institutions                          449,653            563,941           493,250
Interest on U.S. government
   treasury securities                             664,781            511,121           521,808
Interest on investment securities
   exempt from federal income taxes                      0                  0            36,722
Interest on federal funds sold                     555,917            602,366           374,010
- -----------------------------------------------------------------------------------------------
Total interest income                            8,396,992          7,376,426         7,000,062
- -----------------------------------------------------------------------------------------------
INTEREST EXPENSE:
Interest on savings deposits                        44,628             43,182            53,248
Interest on interest-bearing
   transaction accounts                            637,360            628,004           619,574
Interest on time deposits                        1,258,064          1,266,581           863,034
- -----------------------------------------------------------------------------------------------
Total interest expense                           1,940,052          1,937,767         1,535,856
Net interest income                              6,456,940          5,438,659         5,464,206
- -----------------------------------------------------------------------------------------------
Provision for loan losses (Note 3)                 270,000            125,000           415,000
- -----------------------------------------------------------------------------------------------
Net interest income after
  provision for loan losses                      6,186,940          5,313,659         5,049,206
- -----------------------------------------------------------------------------------------------
NON-INTEREST INCOME:
Service charges on deposit accounts                304,315            311,227           368,293
Other customer fees and charges                    211,280            227,503           181,530
- -----------------------------------------------------------------------------------------------
Total non-interest income                          515,595            538,730           549,823
- -----------------------------------------------------------------------------------------------
NON-INTEREST EXPENSE:
Salaries and employee benefits                   2,111,100          1,878,142         1,786,070
Occupancy expense (Notes 5 and 11)                 364,099            362,169           360,020
Equipment expense (Notes 5 and 11)                 143,822             90,702            97,189
FDIC assessment                                      9,186              2,000            83,797
Legal expense                                       41,062            126,788           116,872
Insurance expense                                   59,722             73,784            80,324
Foreclosure and REO expense                        129,058             85,017           117,920
Other                                              880,476            789,587           712,510
- -----------------------------------------------------------------------------------------------
Total non-interest expense                       3,738,525          3,408,189         3,354,702
Income before income taxes                       2,964,010          2,444,200         2,244,327
- -----------------------------------------------------------------------------------------------
Provision for income taxes (Note 6)              1,255,856          1,032,329           928,820
- -----------------------------------------------------------------------------------------------
Net Income                                      $1,708,154         $1,411,871        $1,315,507
- -----------------------------------------------------------------------------------------------
EARNINGS PER SHARE (NOTE 7)
Earnings per common share                            $3.97              $3.32             $3.10
- -----------------------------------------------------------------------------------------------
Earnings per common share - assuming dilution        $3.72              $3.11             $2.87
- -----------------------------------------------------------------------------------------------

</TABLE>

    The accompanying notes are an integral part of these consolidated 
financial statements.

<PAGE>
<TABLE>
             SUMMIT BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED STATEMENTS OF CHANGES
           IN SHAREHOLDERS' EQUITY FOR THE YEARS ENDED DECEMBER 31, 1997, 1996, AND 1995
<CAPTION>
                                    NUMBER OF
                                      SHARES           COMMON          RETAINED
                                    OUTSTANDING         STOCK          EARNINGS        TOTAL
- ----------------------------------------------------------------------------------------------
<S>                                 <C>             <C>             <C>             <C>
- -----------------------------------------------------------------------------------------------
Balance at December 31, 1994        427,485         $3,837,684      $6,656,072      $10,493,756
- ----------------------------------------------------------------------------------------------
Issuance of Cash Dividends,
   $1.50 per share (Note 10)              0                  0        (636,576)        (636,576)
Repurchase of Common Stock           (3,226)           (70,426)              0          (70,426)
Net Income                                0                  0       1,315,507        1,315,507
- -----------------------------------------------------------------------------------------------
Balance at December 31, 1995        424,259          3,767,258       7,335,003       11,102,261
- ----------------------------------------------------------------------------------------------
Issuance of Cash Dividends,
   $1.50 per share (Note 10)              0                  0        (638,074)        (638,074)
Stock Options Exercised (Note 9)     10,780            118,373               0          118,373
Repurchase of Common Stock           (1,830)           (55,288)              0          (55,288)
Net Income                                0                  0       1,411,871        1,411,871
- -----------------------------------------------------------------------------------------------
Balance at December 31, 1996        433,209          3,830,343       8,108,800       11,939,143
- -----------------------------------------------------------------------------------------------
Issuance of Cash Dividends,
   $1.50 per share (Note 10)              0                  0        (647,430)        (647,430)
Stock Options Exercised (Note 9)     10,000            100,000               0          100,000
Repurchase of Common Stock           (6,644)          (221,198)              0         (221,198)
Net Income                                0                  0       1,708,154        1,708,154
- -----------------------------------------------------------------------------------------------
Balance at December 31, 1997        436,565         $3,709,145      $9,169,524      $12,878,669
- -----------------------------------------------------------------------------------------------

</TABLE>

   The accompanying notes are an integral part of these consolidated 
financial statements.

<PAGE>
<TABLE>
                       SUMMIT BANCSHARES, INC. AND STATEMENTS OF CASH FLOWS
                       FOR THE YEARS ENDED DECEMBER 31, 1997, 1996, AND 1995
<CAPTION>

                                              1997               1996              1995
- ------------------------------------------------------------------------------------------
<C>                                        <C>               <C>               <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Interest received                          $  261,554        $   249,103       $   85,249
Rental Income                                  52,200             52,200           52,200
Other Income                                    9,667              8,652           12,561
Cash paid to supplier                         (20,480)           (20,784)         (27,192)
Property taxes paid                                 0                  0                0
Property tax refund                                 0                  0            4,060
Income taxes paid                            (108,000)          (134,276)         (23,774)
Income tax refund                                   0                  0                0
- ------------------------------------------------------------------------------------------
Net cash provided by operating activities     187,941            154,895          103,104
- ------------------------------------------------------------------------------------------

CASH FLOWS FROM INVESTING ACTIVITIES:
Decrease in short term investments            100,000          1,000,000          295,000
Net (increase) decrease in loans            1,680,514           (730,461)      (1,491,482)
Dividends received from subsidiary            825,000            400,000        1,700,000
- ------------------------------------------------------------------------------------------
Net cash provided by (used in) investing
  activities                                2,605,514            669,539          503,518
- ------------------------------------------------------------------------------------------
CASH FLOWS FROM FINANCING ACTIVITIES:
Stock options exercised                       100,000            118,373                0
(Increase) decrease in other assets           (15,529)           (43,554)          65,000
Purchase of common stock                     (221,198)           (55,288)         (70,426)
Dividends paid                               (647,430)          (638,074)        (636,576)
- ------------------------------------------------------------------------------------------
Net cash provided by (used in) financing
  activities                                 (784,157)          (618,543)        (642,002)
- ------------------------------------------------------------------------------------------
Net increase (decrease) in cash and cash
  equivalents                               2,009,298            205,891          (35,380)
Cash at the beginning of the year             227,230             21,339           56,719
- ------------------------------------------------------------------------------------------
Cash at the end of the year                $2,236,828        $   227,230       $   21,339
- ------------------------------------------------------------------------------------------

RECONCILIATION OF NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES:
Net Income                                 $1,708,154        $ 1,411,871        1,315,507
Adjustments to reconcile net income to
  net cash provided by operating activities:
Depreciation and amortization                  17,808             17,806           17,808
Non-cash earnings from subsidiary          (1,543,759)        (1,257,026)      (1,259,957)
Decrease in accounts receivable                     0              2,434           14,500
Increase (decrease) in accounts payable        (3,318)             4,255                0
Increase (decrease) in income tax payable       9,056            (24,447)          15,246
- -------------------------------------------------------------------------------------------
Total adjustments                          (1,520,213)        (1,256,976)      (1,212,403)
- -------------------------------------------------------------------------------------------
Net cash provided by operating activities  $  187,941        $   154,895      $   103,104
- --------------------------------------------------------------------------------------------

</TABLE>

<PAGE>

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                              DECEMBER 31, 1997

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
- ------------------------------------------------------------------------------

The accounting and reporting policies of Summit Bancshares, Inc. (the 
Company), and its wholly owned subsidiary, Summit Bank (the Bank), a 
California state-chartered bank, conform with generally accepted accounting 
principles and general practice within the banking industry. The following 
are descriptions of the more significant of these policies.

NATURE OF OPERATIONS

The Bank has conducted the business of a commercial bank since July 1, 1982. 
The Bank operates three branches and provides commercial credit and other 
banking services to small and mid-sized businesses and professionals, 
including professional firms of physicians, attorneys, accountants, real 
estate developers, retailers, and service firms, wholesalers, and 
distributors.

USE OF ESTIMATES IN THE PREPARATION OF FINANCIAL STATEMENTS

The preparation of financial statements in conformity with generally accepted 
accounting principles requires management to make estimates and assumptions 
that affect the reported amounts of assets and liabilities and disclosure of 
contingent assets and liabilities at the date of the financial statements and 
the reported amounts of revenues and expenses during the reporting period. 
Actual results could differ from those estimates.

BASIS OF PRESENTATION

The consolidated financial statements include the accounts of the Company and 
the Bank. Significant intercompany transactions have been eliminated in 
consolidation. Certain prior years' amounts have been reclassified to conform 
with present year presentation.

INVESTMENT SECURITIES

All investment securities are classified as held to maturity and are carried 
at cost, adjusted for amortization of premium and accretion of discount using 
a method that approximates the effective interest method. Gains and losses on 
sale or redemption of securities are determined using the specific 
identification method.

PREMISES AND EQUIPMENT

Premises and equipment are carried at cost, net of accumulated depreciation 
and amortization. Depreciation on furniture and equipment is calculated on a 
straight-line basis over the estimated useful life of the property, generally 
seven years for furniture and three to fifteen years for equipment. Leasehold 
improvements are amortized over the life 

<PAGE>

of the related lease or the estimated life of the improvements, whichever is 
shorter.

LOANS

Loans are stated at the principal amount outstanding. Interest income is 
accrued daily using the simple interest method. Loans are placed on 
nonaccrual status when management believes that there is serious doubt as to 
the collection of principal or interest, or when they become contractually 
past-due ninety days or more with respect to principal or interest, except 
for loans that are well secured and in the process of collection. When loans 
are placed on nonaccrual status, any accrued but uncollected interest is 
reversed from current income, and additional income is recorded only as 
payments are received and where future collection of principal is probable. 
Loan origination and commitment fees, offset by certain direct loan 
origination costs, are deferred and amortized as yield adjustments over the 
contractual lives of the related loans.

ALLOWANCE FOR LOAN LOSSES

The allowance for loan losses is based upon estimates of potential loan 
losses and is maintained at a level considered adequate to provide for losses 
that can be reasonably anticipated. The allowance is increased by provisions 
charged to expense and reduced by net charge-offs. The Bank considers its 
past loan loss experience, known and inherent risks in the portfolio, adverse 
situations that may affect the borrower's ability to repay, the estimated 
value of any underlying collateral, current economic conditions, and other 
factors in periodic valuations of the adequacy of the allowance balance. The 
allowance for loan losses is based on estimates, and ultimate losses may vary 
from current estimates.

OTHER REAL ESTATE OWNED

Other real estate owned is comprised of properties acquired through 
foreclosure. These properties are carried at the lower of the recorded loan 
balance or their estimated fair market value based on appraisal. When the 
recorded loan balance exceeds the fair value of the property, the difference 
is charged to the allowance for loan losses at the time of acquisition. 
Subsequent declines in value from the recorded amount, if any, and gains or 
losses upon disposition are included in noninterest expense or income as 
appropriate. Operating expenses related to other real estate owned are 
charged to noninterest expense in the period incurred.

INCOME TAXES

Income taxes reported in the statements of income are computed at current tax 
rates, including deferred taxes resulting from timing differences between the 
recognition of items for tax and financial reporting purposes.

The Company records deferred taxes based on the liability method. The net 
deferred tax liability or asset is determined based on the tax 

<PAGE>

effects of the differences between the book and tax bases of the various 
balance sheet assets and liabilities. Under this method, the computation of 
the net deferred tax liability or asset gives current recognition to changes 
in tax laws and rates.

CASH AND CASH EQUIVALENTS

For purposes of reporting cash flows, cash and cash equivalents include cash 
on hand, amounts due from banks, and federal funds sold. Generally, federal 
funds sold are purchased and sold for one-day periods.

2. INVESTMENT SECURITIES
- ------------------------------------------------------------------------------

The amortized cost and estimated fair values of investments in debt 
securities held-to-maturity as of December 31, 1997, are as follows:

<TABLE>
<CAPTION>
                                              Gross          Gross         Estimated
                             Amortized      Unrealized     Unrealized        Fair
                               Cost           Gains          Losses          Value
                            -----------     ----------     ----------     -----------
<S>                         <C>               <C>             <C>         <C>
U.S. Treasury securities    $ 5,496,831       $10,599              $0     $ 5,507,430
U.S. Agencies                 6,999,820         8,406               0       7,008,226
                            -----------       -------         -------     -----------
Total Securities            $12,496,651       $19,005              $0     $12,515,656
                            -----------       -------         -------     -----------
                            -----------       -------         -------     -----------
</TABLE>

The amortized cost and estimated fair values of investments in debt 
securities held-to-maturity as of December 31, 1996, are as follows:

<TABLE>
<CAPTION>
                                              Gross          Gross         Estimated
                              Amortized     Unrealized     Unrealized         Fair
                                Cost          Gains          Losses          Value
                             ----------     ----------     ---------      ----------
<S>                          <C>             <C>              <C>         <C>
U.S. Treasury securities     $7,759,850       $70,960             $0      $7,830,810
U.S. Agencies                 1,000,000             0              0       1,000,000
                             ----------     ----------     ---------      ----------
Total Securities             $8,759,850       $70,960             $0      $8,830,810

</TABLE>

The amortized cost and estimated fair value of debt securities at December 
31, 1997, by contractual maturities are shown below. Expected maturities will 
differ from contractual maturities because borrowers may have the right to 
call or prepay obligations with or without call or prepayment penalties.

<TABLE>
<CAPTION>
                                                 Estimated
                               Amortized            Fair
                                 Cost              Value
                              -----------      ------------
<S>                           <C>               <C>
Due in one year or less       $ 7,798,908       $ 7,817,913
Due in one year through      
  five years                    4,697,743         4,697,743
                              -----------      ------------
Total                         $12,496,651       $12,515,656
                              -----------      ------------
                              -----------      ------------
</TABLE>

<PAGE>

There were no sales of investments in debt securities during 1997 or 1996. At 
December 31, 1997, securities carried at $999,956 were pledged to secure 
public deposits, as required by law.

3. LOANS AND ALLOWANCE FOR LOAN LOSSES
- ------------------------------------------------------------------------------

A summary of loans as of December 31, 1997, and 1996 (net of unearned loan 
fees of $235,660 and $273,755, respectively), is as follows:

<TABLE>
<CAPTION>
                                            -----------        -----------
                                               1997               1996
                                            -----------        -----------
     <S>                                    <C>                <C>
     Commercial loans                       $44,043,942        $35,788,655
     Real estate loans                        4,850,194          3,062,950
     Real estate construction loans           7,470,606          7,507,790
     Installment loans                        5,706,129          6,118,961
                                            -----------        -----------
                                             62,070,871         52,478,356
     Less: Allowance for loan losses         (1,238,012)        (1,070,318)
                                            -----------        -----------
                                            $60,832,859        $51,408,038
                                            -----------        -----------
                                            -----------        -----------
</TABLE>

The changes in the allowance for loan losses for the years ended December 31, 
1997, 1996, and 1995, are as follows:

<TABLE>
<CAPTION>
                                    1997           1996           1995
                                 ----------     ----------     ----------
<S>                              <C>            <C>            <C>  
Balance, beginning of period     $1,070,318     $1,024,922     $  931,878
Provision for loan losses           270,000        125,000        415,000
Recoveries                            3,000          3,500         11,752
Loans charged-off                  (105,306)       (83,104)      (333,708)
                                 ----------     ----------     ----------
Balance, end of period           $1,238,012     $1,070,318     $1,024,922
                                 ----------     ----------     ----------
                                 ----------     ----------     ----------
</TABLE>

The following table provides information with respect to the subsidiary 
Bank's past due loans and components for non-performing assets at the dates 
indicated.

<TABLE>
<CAPTION>
                                                           NON-PERFORMING ASSETS
                                                        ------------------------------
                                                               (000's Omitted)
                                                                 December 31,
                                                         1997        1996        1995
                                                        ------      ------      ------
<S>                                                     <C>         <C>         <C>
Loans 90 days or more past due and still accruing:                              
  Commercial                                            $  408      $    0      $  367
Non-accrual loans:                                                              
  Commercial                                               151           0          39
  Real Estate                                                0           0           0
  Consumer                                                  25           0           0
                                                        ------      ------      ------
    Total                                               $  176      $    0      $   39
Other Real Estate Owned                                  1,222       1,291       1,303
                                                        ------      ------      ------
TOTAL NON-PERFORMING ASSETS                             $1,806      $1,291      $1,709
                                                        ------      ------      ------
                                                        ------      ------      ------
</TABLE>

<PAGE>

The subsidiary Bank's policy is to recognize interest income on an accrual 
basis unless the full collectibility of principal and interest is uncertain. 
As mentioned previously, loans that are delinquent ninety days as to 
principal or interest are placed on a nonaccrual basis, unless they are well 
secured and in the process of collection, and any interest earned but 
uncollected is reversed from income. Collectibility is determined by 
considering the borrower's financial condition, cash flow, quality of 
management, the existence of collateral or guarantees, and the state of the 
local economy.

Impairment of loans having recorded investments of $176,000 at December 31, 
1997, and $0 at December 31, 1996, has been recognized in conformity with 
FASB Statement No. 114, as amended by FSAB Statement No. 118. The average 
recorded investment in impaired loans during 1997 and 1996 was $88,000 and 
$0, respectively. The total allowance related to these loans was $15,000 and 
$0 at December 31, 1997, and 1996, respectively. Interest income recognized 
on impaired loans was $13,133 and $0 for the years ended December 31, 1997, 
and 1996, respectively.

The Bank grants commercial, construction, and installment loans to customers 
mainly in the California counties of Alameda and Contra Costa. Although the 
Bank has a diversified loan portfolio, a substantial portion of its 
commercial loan portfolio is concentrated in loans to customers in or related 
to the medical profession. The greater portion of these loans are secured by 
real estate located within the two counties. The amount in other real estate 
owned is comprised of three vacant land parcels.

4. RELATED PARTY TRANSACTIONS
- ------------------------------------------------------------------------------

The Bank has, and expects to have in the future, banking transactions in the 
ordinary course of its business with directors, officers, and principal 
shareholders and their associates. In management's opinion and as required by 
federal law, loans to related parties are granted on the same terms, 
including interest rates and collateral, as those prevailing at the same time 
for comparable transactions with others, and do not involve more than normal 
risk of collectibility or present other unfavorable features. As of December 
31, 1997, and 1996, loans outstanding to directors, officers, and principal 
shareholders and their known associates were $161,349 and $372,087, 
respectively. In 1997, advances on such loans were $184,979, and collections 
were $395,717. In 1996 advances on such loans were $656,898 and collections 
were $406,978.

5. PREMISES AND EQUIPMENT
- ------------------------------------------------------------------------------

Premises and equipment consisted of the following:



<PAGE>

<TABLE>
<CAPTION>
                                                     ACCUMULATED
                                   ----------------------------------------------
                                                     Depreciation/      Net Book
                                       Cost          Amortization         Value
                                   -------------     -------------     ----------
<S>                                 <C>              <C>                <C>
December 31, 1997:                                                     
  Land and building                 $  497,912        $  120,200        $377,712
  Leasehold improvements             1,128,862           899,484         229,378
  Furniture and equipment              656,992           391,463         265,529
                                   -------------     -------------     ----------
    Total                           $2,283,766        $1,411,147         872,619
                                   -------------     -------------     ----------
                                   -------------     -------------     ----------
December 31, 1996:                                                     
  Land and building                 $  497,912        $  102,393        $395,519
  Leasehold improvements             1,119,851           809,681         310,170
  Furniture and equipment              492,609           301,442         191,167
                                   -------------     -------------     ----------
    Total                           $2,110,372        $1,213,516        $896,856
                                   -------------     -------------     ----------
                                   -------------     -------------     ----------
</TABLE>

Depreciation and amortization included in occupancy and equipment expenses 
were $194,887, $141,061, and $142,154 for the years ended December 31, 1997, 
1996, and 1995, respectively.

6. INCOME TAXES
- ------------------------------------------------------------------------------

The provision (benefit) for income taxes consists of the following:

<TABLE>
<CAPTION>

                          1997               1996             1995
                       ----------         ----------        --------
<S>                    <C>                <C>               <C>
Current:
  Federal              $1,038,000         $  783,000        $714,000
  State                   345,000            287,000         223,000
                       ----------         ----------        --------
Total current           1,383,000          1,070,000         937,000
Deferred:
  Federal                (124,000)           (36,000)        (37,000)
  State                    (3,000)            (2,000)         29,000
                       ----------         ----------        --------
Total deferred           (127,000)           (38,000)         (8,000)

Total taxes            $1,256,000         $1,032,000        $929,000

</TABLE>

The components of the net deferred tax asset of the Company as of December 
31, 1997, and 1996, were as follows:

<PAGE>

<TABLE>
<CAPTION>

                                       1997            1996
                                     --------        --------
<S>                                  <C>             <C>
Deferred Tax Assets:
  Allowance for loan losses          $419,000        $335,000
  State taxes                          81,000          78,000
  Depreciation                         68,000          65,000
  Other                                59,000          24,000
Deferred Tax Liabilities:
  Accretion                            (2,000)         (4,000)
                                     --------        --------
Total                                $625,000        $498,000
</TABLE>

The provisions for income taxes applicable to operating income differ from 
the amount computed by applying the statutory federal tax rate to operating 
income before taxes. The reasons for these differences are as follows:

<TABLE>
<CAPTION>
                                        1997                       1996                    1995
                               ----------------------     ---------------------     -------------------
                                 Amount       Percent       Amount      Percent     Amount      Percent
                               -----------    -------     ----------    -------     --------    -------
<S>                             <C>            <C>        <C>            <C>        <C>         <C>
Federal income tax expense,
  based on the statutory                                                                        
  federal income tax rate       $1,008,000     34.00%     $  831,000     34.00%     $763,000    34.00%
Municipal income                         0       .00%              0       .00%      (13,000)    (.60%)
State franchise taxes, net
  of federal income tax
  benefit                          212,000      7.20%        188,000      7.70%      166,000      7.40%
Other, net                          36,000      1.20%         13,000       .50%       13,000       .60%
                               -----------     ------     ----------    -------     --------     ------
                                $1,256,000     42.40%     $1,032,000     42.20%     $929,000     41.40%

</TABLE>

7. SHAREHOLDERS' EQUITY AND EARNINGS PER SHARE
- ------------------------------------------------------------------------------

Earnings per share (EPS) for the years ended December 31, 1997, 1996, and 
1995, are shown in accordance with SFAS No. 128, Earnings per Share, which 
was effective for fiscal years ended after December 15, 1997, and requires 
restatement of prior periods EPS. Basic EPS is computed by dividing income 
available to common shareholders by the weighted average number of common 
shares outstanding during the period. Diluted EPS is computed by dividing 
diluted income available to shareholders by the weighted average number of 
common shares and common equivalent shares outstanding which include dilutive 
stock options. The computation of common stock equivalent shares is based on 
the weighted average market rice of the Company's common stock throughout the 
period. The following is a reconciliation of the numerators and denominators 
of the basic and diluted EPS computations for the years ended December 31, 
1997, 1996, and 1995.

<PAGE>

<TABLE>
<CAPTION>




                                                                      FOR THE YEAR ENDED
                               -------------------------------------------------------------------------------------------------
                                      December 31, 1997                December 31, 1996                December 31, 1995
                               -------------------------------   -------------------------------  ------------------------------
                                                         Per                               Per                               Per
                                 Income      Shares     Share      Income      Shares     Share      Income      Shares     Share
                              (Numerator) (Denominator) Amount  (Numerator) (Denominator) Amount  (Numerator) (Denominator) Amount
                              --------------------------------  --------------------------------  --------------------------------
<S>                            <C>           <C>        <C>     <C>           <C>        <C>      <C>           <C>        <C>

Net Income                     $1,708,154                       $1,411,871                        $1,315,507    
                                                                                                                
Basic EPS Income                                                                                                
  Available to                                                                                                  
  Common Stockholder           $1,708,154    430,231    $3.97   $1,411,871    424,920    $3.32    $1,315,507    424,868    $3.10
                                                                                                                
EFFECT OF DILUTIVE SECURITIES                                                                                   
- -----------------------------                                                                                   
  Stock Options                               29,084                           29,069                           32,731
                                                                                                                
Diluted EPS                                                                                                     
Income Available to Common                                                                                      
  Stockholders + Assumed                                                                                        
  Conversion                   $1,708,154    459,315    $3.72   $1,411,871    453,989    $3.11    $1,315,507    457,599    $2.87

</TABLE>

8. REGULATORY CAPITAL
- ------------------------------------------------------------------------------

The Company and the Bank are subject to various regulatory capital 
requirements administered by federal banking agencies. Failure to meet 
minimum capital requirements can initiate certain mandatory, and possibly 
additional discretionary actions by regulators that, if undertaken, could 
have a direct material effect on the financial statements. Under capital 
adequacy guidelines and the regulatory framework for prompt corrective 
action, the Company and the Bank must meet specific capital guidelines that 
involve quantitative measures of the Bank's assets, liabilities, and certain 
off-balance-sheet items as calculated under regulatory accounting practices. 
The capital amounts and classification are also subject to qualitative 
judgments by the regulators about components, risk weightings, and other 
factors.

Quantitative measures established by regulation to ensure capital adequacy 
require the Company and the Bank to maintain minimum amounts and ratios (set 
forth in the table below) of total and Tier 1 capital (as defined in the 
regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as 
defined) to average assets (as defined). Management believes, as of December 
31, 1997, that the Company and the Bank meet all capital adequacy 
requirements to which they are subject.

As of December 31, 1997, the most recent notification from Federal Deposit 
Insurance Corporation categorized the Bank as well-capitalized under the 
regulatory framework for prompt correction action. To be categorized as 
well-capitalized, the Bank must maintain minimum total risk-based, Tier 1 
risk-based, Tier 1 leverage ratios as set forth in the table. There are no 
conditions or events since that notification that management believes have 
changed the institution's category.

The consolidated and Bank's actual capital amounts and ratios are also 
presented in the table.

<PAGE>

<TABLE>
<CAPTION>
                                                                                                           TO BE WELL- CAPITALIZED
                                                                                                                UNDER PROMPT
                                                                               FOR CAPITAL                       CORRECTIVE
                                              ACTUAL                        ADEQUACY PURPOSES                ACTION PROVISIONS
- ----------------------------------------------------------------------------------------------------------------------------------
                                      AMOUNT          RATIO               AMOUNT         RATIO               AMOUNT          RATIO
- ------------------------------------------------------------------------------------------------------------------------ ---------
<S>                              <C>                  <C>             <C>                 <C>            <C>                 <C>  
    
As of December 31, 1997
Total Capital
  (to Risk Weighted Assets)
  Consolidated                   $13,713,000          19.97% GREATER  $5,494,000 GREATER  8.00% GREATER  $6,868,000 GREATER  10.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                            10,029,000          14.92% GREATER   5,377,000 GREATER  8.00% GREATER   6,721,000 GREATER  10.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
Tier 1 Capital
  (to Risk Weighted Assets)
  Consolidated                    12,879,000          18.75% GREATER   2,747,000 GREATER  4.00% GREATER   4,121,000 GREATER   6.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                             9,213,000          13.71% GREATER   2,689,000 GREATER  4.00% GREATER   4,033,000 GREATER   6.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
Tier 1 Capital                                                                                                              
  (to Average Assets)
  Consolidated                    12,879,000          12.43% GREATER   4,144,000 GREATER  4.00% GREATER   5,180,000 GREATER   5.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                             9,213,000           9.12% GREATER   4,040,000 GREATER  4.00% GREATER   5,050,000 GREATER   5.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            

As of December 31, 1996
Total Capital
  (to Risk Weighted Assets)
  Consolidated                   $12,679,000          20.47% GREATER  $4,955,000 GREATER  8.00% GREATER  $6,194,000 GREATER  10.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                             9,197,000          15.61% GREATER   4,714,000 GREATER  8.00% GREATER   5,893,000 GREATER  10.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
Tier 1 Capital
  (to Risk Weighted Assets)
  Consolidated                    11,939,000          19.28% GREATER   2,478,000 GREATER  4.00% GREATER   3,716,000 GREATER   6.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                             8,494,000          14.41% GREATER   2,357,000 GREATER  4.00% GREATER   3,536,000 GREATER   6.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
Tier 1 Capital
  (to Average Assets)
  Consolidated                    11,939,000          13.14% GREATER   3,634,000 GREATER  4.00% GREATER   4,542,000 GREATER   5.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
  Bank                             8,494,000           9.63% GREATER   3,528,000 GREATER  4.00% GREATER   4,410,000 GREATER   5.00%
                                                             THAN OR             THAN OR        THAN OR             THAN OR       
                                                             EQUAL               EQUAL          EQUAL               EQUAL         
                                                             TO                  TO             TO                  TO            
</TABLE>


9. STOCK OPTION PLAN
- ------------------------------------------------------------------------------

The Company adopted an incentive stock option plan in 1982 and reserved 
40,000 shares of the Company's common stock for issuance under this plan. In 
1986, the directors and shareholders approved increasing the number of shares 
in this plan to 90,000. The additional shares were registered in accordance 
with federal and state securities laws in 1987. In 1987, the Company issued a 
10% stock dividend which increased the number of shares in this plan to 
99,000. Options may be granted at a price not less than the fair market value 
of the stock at the date of grant, become exercisable in cumulative 10% 
annual installments commencing one year after the date of grant, and expire 
ten years from the date of grant.

In 1992, the shareholders approved the 1992 Employee and Consultant Stock 
Option Plan (the "1992 Plan") which was designed to replace the 1982 
Incentive Stock Option Plan that expired on February 28, 1992, after which no 
new unallocated stock options may be granted. The 1992 Plan was designed to 
carry forward the remaining 82,995 options issued but not exercised under the 
1982 Incentive Plan at the then current market price. No new additional 
shares of the Company have been reserved for issuance under the 1992 Plan.

<PAGE>

In addition to the above plan, shareholders approved, in 1989, the 1989 
Non-Qualified Stock Option Plan for Directors, including Advisory Board 
members, and reserved 35,000 shares of the Company's common stock for 
issuance under this plan. The plan was established to give appropriate 
recognition to this group of individuals for their continuing responsibility 
for the Company's growth and profitability.

Statement of Financial Accounting Standards No. 123 (SFAS No. 123), 
"Accounting for Stock Based Compensation," is effective for transactions 
entered into for fiscal years beginning after December 15, 1995, and applies 
to awards made in fiscal years beginning after December 15, 1994. This 
statement defines a fair-value method of accounting for stock-based 
compensation. As permitted by SFAS No. 123, the Company accounts for stock 
options under APB Opinion No. 25, under which no compensation cost has been 
recognized. The Company has made no awards under its stock option plans 
subsequent to January 1, 1995. As such, pro forma net income and earnings per 
share data as if compensation cost for these plans had been determined 
consistent with SFAS No. 123 would not differ from the reported amounts in 
the Company's income statement.

The following table summarizes the stock option activity under the 1982 
Incentive Stock Option Plan for the years ended December 31, 1997, 1996, and 
1995.

<TABLE>
<CAPTION>

                                  NUMBER OF SHARES        WEIGHTED AVERAGE
                                    OUTSTANDING            EXERCISE PRICE
                                  ----------------         --------------
<S>                               <C>                      <C>
Balance, December 31, 1994                  57,095                 $11.09
  Granted                                        0                   0.00
  Exercised                                      0                   0.00
  Expired                                        0                   0.00
  Forfeited                                   (500)                 13.00
                                   ---------------         --------------
Balance, December 31, 1995                  56,595                 $11.07
  Granted                                        0                   0.00
  Exercised                                (10,680)                 10.92
  Expired                                        0                   0.00
  Forfeited                                 (1,170)                 13.00
                                   ---------------         --------------
Balance, December 31, 1996                  44,745                 $11.06
  Granted                                        0                   0.00
  Exercised                                (10,000)                 10.00
  Expired                                        0                   0.00
  Forfeited                                      0                   0.00
                                   ---------------         --------------
Balance, December 31, 1997                  34,745                 $11.17

</TABLE>

As of December 31, 1997, 1996, and 1995, 24,941, 29,429, and 33,623 of the 
options, respectively, were exercisable. The options outstanding at December 
31, 1997, have exercise prices between $10.00 and $13.50, with a weighted 
average exercise price of $11.36 and a weighted average remaining contractual 
life of 4.1 years.

<PAGE>

The following table summarizes the stock option activity under the 1992 
Employee and Consultant Stock Option Plan during the years ended December 31, 
1997, 1996, and 1995.

<TABLE>
<CAPTION>

                                  NUMBER OF SHARES         WEIGHTED AVERAGE
                                    OUTSTANDING             EXERCISE PRICE
                                  ----------------         -----------------
<S>                               <C>                      <C>
Balance, December 31, 1994                   9,100                    $17.75
  Granted                                        0                      0.00
  Exercised                                      0                      0.00
  Expired                                        0                      0.00
  Forfeited                                   (500)                    17.75
                                  ----------------         -----------------
Balance, December 31, 1995                   8,600                    $17.75
  Granted                                        0                      0.00
  Exercised                                   (100)                    17.75
  Expired                                        0                      0.00
  Forfeited                                   (400)                    17.75
                                  ----------------         -----------------
Balance, December 31, 1996                   8,100                    $17.75
  Granted                                        0                      0.00
  Exercised                                      0                      0.00
  Expired                                        0                      0.00
  Forfeited                                      0                      0.00
                                  ----------------         -----------------
Balance, December 31, 1997                   8,100                    $17.75

</TABLE>

As of December 31, 1997, 1996, and 1995, 2,430, 1,620 and 860 of the options, 
respectively, were exercisable. All of the options outstanding as of December 
31, 1997, have an exercise price of $17.75 and a weighted average remaining 
contractual life of 6.6 years.

There have been no grants, exercises, expirations, or forfeitures during the 
years ending December 31, 1997, 1996, and 1995 under the 1989 Non-Qualified 
Stock Option Plan. As of December 31, 1997, 1996, and 1995, no options were 
outstanding under this Plan.

10. RESTRICTIONS
- ------------------------------------------------------------------------------

The Bank is regulated by the Federal Deposit Insurance Corporation, whose 
regulations do not specifically limit payment of dividends, and the 
California State Banking Department. California banking laws limit dividends 
to the lesser of retained earnings or net income less dividends paid for the 
last three years. Under these restrictions, at December 31, 1997, the Bank 
could pay dividends to the Company of up to approximately $1,135,742 without 
prior regulatory approval.

11. COMMITMENTS AND CONTINGENT LIABILITIES
- ------------------------------------------------------------------------------

The Company is obligated for rental payments under certain operating lease 
and contract agreements. Total rental expense for all leases

<PAGE>

included in occupancy and equipment expenses was $206,766, $208,665, and 
$208,215 for the years ended December 31, 1997, 1996, and 1995.

At December 31, 1997, the approximate future minimum payments for 
noncancelable leases with initial or remaining terms in excess of one year 
were as follows:

<TABLE>
<CAPTION>

      <S>                                               <C>
      1998                                              $180,795
      1999                                               122,458
      2000                                               122,458
      2001                                                67,605
      2002                                                38,045
</TABLE>

The Company is subject to various pending and threatened legal actions which 
arose out of the normal course of business. In the opinion of management, the 
disposition of claims currently pending will not have a material adverse 
effect on the Company's financial position.

The Bank is required by federal regulations to maintain certain minimum 
average balances with the Federal Reserve. Required deposits held with the 
Federal Reserve at December 31, 1997, were $890,000.

12. PENSION PLAN
- ------------------------------------------------------------------------------

The Company provides pension benefits for all its eligible employees through 
a 401(k) Profit Sharing Program which was adopted in 1984. Under the terms of 
the plan, eligible employees are allowed to contribute, under the 401(k) 
portion of the plan, up to 15% of their salaries. The Company in turn will 
match the employee's contribution up to a maximum of 3% of the employee's 
total annual compensation. Under this part of the plan, $24,773 was 
contributed in 1997, $7,018 in 1996, and $4,425 in 1995.

In addition, the Company may contribute up to 15% of eligible employees' 
annual compensation to the profit sharing portion of this plan. Such 
contributions were $101,472 in 1997, $78,398 in 1996, and $92,156 in 1995. 
Employees' interest in the contributions made by the Company on their behalf 
become 100% vested in accordance with the seven year program. Any forfeited 
amounts are redistributed among the remaining participants in the plan.

13. FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK
- ------------------------------------------------------------------------------

The Company is a party to financial instruments with off-balance-sheet risk 
in the normal course of business to meet the financing needs of its 
customers. These financial instruments include commitments to extend credit, 
and standby letters of credit. These instruments involve, to varying degrees, 
elements of credit risk in excess of the amount recognized in the statement 
of financial position. The contract amount

<PAGE>

of those instruments reflects the extent of involvement the company has in 
particular classes of financial instruments.

The Company's exposure to credit loss in the event of nonperformance by the 
other party to the financial instrument for commitments to extend credit and 
standby letters of credit is represented by the contractual notional amount 
of those instruments. The Company uses the same credit policies in making 
commitments and conditional obligations as it does for on-balance-sheet 
instruments. At December 31, 1997, financial instruments whose contract 
amounts represent credit risk:

<TABLE>
<CAPTION>

                                                   CONTRACT AMOUNT
                                        --------------------------------------
<S>                                                    <C>
Commitments to extend credit in the
  future                                               $ 19,076,880
Standby letters of credit                                 1,067,554

</TABLE>

Commitments to extend credit are agreements to lend to a customer as long as 
there is no violation of any condition established in the contract. 
Commitments generally have fixed expiration dates or other termination 
clauses and may require payment of a fee. Since many of the commitments are 
expected to expire without being drawn upon, the total commitment amounts do 
not necessarily represent future cash requirements. The Company evaluates 
each customer's credit worthiness on a case-by-case basis. The amount of 
collateral obtained if deemed necessary by the Company upon extension of 
credit is based on management's credit evaluation of the counter-party. 
Collateral held varies but may include accounts receivable, inventory, 
property, plant, and equipment, and income-producing commercial properties. 
Standby letters of credit are conditional commitments issued by the Company 
to guarantee the performance of a customer to a third party. Most all 
guarantees expire within one year. The credit risk involved in issuing 
letters of credit is essentially the same as that involved in extending loan 
facilities to customers.

Approximately 11.8% of the Company's loans are concentrated with health care 
professionals.

14. FAIR VALUE OF FINANCIAL INSTRUMENTS
- ------------------------------------------------------------------------------

Statement of Financial Authority Standards (SFAS) No. 107, "Disclosure about 
Fair Value of Financial Statements," requires the Bank to disclose the fair 
value of financial instruments, both assets and liabilities recognized and 
not recognized in the balance sheet, for which it is practical to estimate 
fair value. Following is a summary of the estimated fair value for each class 
of financial instrument as of December 31, 1997, and the methods and 
assumptions used to evaluate them:

<PAGE>

<TABLE>
<CAPTION>

                                               CARRYING           FAIR
                                                VALUE             VALUE
                                             -----------       -----------
<S>                                          <C>               <C>
Cash and due from banks                      $ 8,664,015       $ 8,664,015
Federal funds sold                            12,910,000        12,910,000
Investment securities                         12,496,651        12,525,319
Due from bank-time                             5,644,000         5,650,943
Loans                                         60,832,859        60,846,445
Deposits
   Demand                                     31,062,481        27,924,250
   Interest bearing transaction accounts      33,012,655        30,690,984
   Savings                                     2,264,538         1,920,483
   Time certificates                          24,092,068        24,091,257

</TABLE>

Cash and due from banks have a relatively short period of time between their 
origination and their expected realization and are valued at their carrying 
amounts. The fair value of investment securities and due from banks-time were 
estimated using quoted market prices or dealer quotes. The allowance for loan 
losses and overdrafts are valued at the carrying amount. All other loans are 
valued by loan type. Loans are spread monthly by maturity and repricing date. 
To determine the fair value the interest rate used to discount the cash flows 
is the current market rate for a like class of loans. Loan fees were not 
taken into consideration. The fair value of noninterest-bearing, 
interest-bearing transaction accounts and savings deposits is the amount 
payable on demand as of December 31, 1997. The fair value of fixed-maturity 
certificates of deposit is estimated using the rates currently offered for 
deposits of similar remaining maturities.

The Bank has off-balance-sheet commitments comprising letters of credit and 
loan commitments with a contract amount of $1,067,554 and $19,076,880, 
respectively. The fair value of these off-balance-sheet commitments is not 
material.

<PAGE>

15. SUMMIT BANCSHARES, INC. (PARENT COMPANY ONLY)
- ------------------------------------------------------------------------------

The following are the statements of financial position as of December 31, 
1997, and 1996, and the related statements of income and cash flows for the 
years ended December 31, 1997, 1996, and 1995, for Summit Bancshares, Inc. 
(parent company only):

<TABLE>
<CAPTION>

STATEMENTS OF FINANCIAL POSITION               1997                    1996
- ------------------------------------------------------------------------------
<S>                                        <C>                     <C>
ASSETS:

Cash                                       $ 2,236,528             $   227,230
Short term investments                               0                 100,000
Loan participation with                        894,894               2,575,408
  subsidiary
Land and building                              377,712                 395,519
Investment in subsidiary                     9,213,319               8,494,384
Other assets                                   184,777                 169,425
- ------------------------------------------------------------------------------
Total Assets                               $12,907,230             $11,961,966
- ------------------------------------------------------------------------------

LIABILITIES:
- ------------------------------------------------------------------------------
Accounts payable                                 5,287             $     8,605
Income taxes payable                            23,274                  14,218
- ------------------------------------------------------------------------------
Total Liabilities                               28,561                  22,823
- ------------------------------------------------------------------------------
Shareholders' Equity:
Common Stock                                 3,709,145               3,830,343
Retained Earnings                            9,169,524               8,108,800
- ------------------------------------------------------------------------------
Total Shareholders' Equity                  12,878,669              11,939,143
- ------------------------------------------------------------------------------

Total Liabilities and                       12,907,230             $11,961,966
  Shareholders' Equity

</TABLE>

<TABLE>
<CAPTION>

STATEMENTS OF INCOME (YEAR ENDED DECEMBER 31)       1997            1996              1995
- ------------------------------------------------------------------------------------------
<S>                                             <C>             <C>             <C>
INCOME: 

Dividends from subsidiary                       $  825,000      $  400,000      $1,700,000
Interest on short-term                             261,554         249,103          97,810
  investments and loan                         
Rental and other income                             61,867          58,242          41,760
- ------------------------------------------------------------------------------------------
Total income                                     1,148,421         707,345       1,839,570
- ------------------------------------------------------------------------------------------
                                             
EXPENSE:                                     

Miscellaneous expense                               41,970          42,671          45,000
- ------------------------------------------------------------------------------------------
Total expense                                       41,970          42,671          45,000
- ------------------------------------------------------------------------------------------
Income before income tax and                 
equity in                                    
  earnings of subsidiary                        1,106,451         664,674       1,794,570
Provision for income taxes                         117,056         109,829          39,020
Income before equity in                      
  earnings of subsidiary                          989,395         554,845       1,755,550
Equity in undistributed income of                  718,759         857,026        (440,043)
  subsidiary                                  
- ------------------------------------------------------------------------------------------
Net Income                                      $1,708,154      $1,411,871      $1,315,507
- ------------------------------------------------------------------------------------------

</TABLE>

<PAGE>

SUMMIT BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED STATEMENTS OF
CASH FLOWS FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995

<TABLE>
<CAPTION>
                                               1997              1996             1995
- ---------------------------------------------------------------------------------------
<S>                                           <C>            <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES:     

Interest received                             $ 7,640,907    $ 6,964,938    $ 6,502,009
Fees received                                   1,071,607      1,015,572      1,058,317
Interest paid                                  (1,901,068)    (1,970,531)    (1,375,953)
Cash paid to suppliers and employees           (3,383,985)    (3,315,929)    (3,245,453)
Income taxes paid                              (1,365,000)    (1,351,000)    (1,111,654)
- ----------------------------------------------------------------------------------------
Net cash provided by operating activities       2,062,461      1,343,050      1,827,268
- ----------------------------------------------------------------------------------------
                                              
CASH FLOWS FROM INVESTING ACTIVITIES:         

(Increase) decrease in time deposits with     
  other financial institutions                  3,963,000      1,395,000      3,963,000
Maturity of investment securities               5,759,332      8,537,242      7,607,380
Purchase of investment securities              (9,496,133)   (11,270,730)    (3,300,845)
Net (increase) in loans to customers           (9,179,696)    (2,311,654)    (3,068,584)
Recoveries on loans previously charged-off          3,000          3,500         11,752
(Increase) in premises and equipment             (173,394)      (166,364)      (112,869)
- ----------------------------------------------------------------------------------------
Net cash (used in) investing activities        (9,123,891)    (3,813,006)    (2,826,166)
- ----------------------------------------------------------------------------------------
                                              
CASH FLOWS FROM FINANCING ACTIVITIES:         

Increase in demand, interest bearing          
  transaction, and savings deposits             7,177,240      2,830,177      1,939,493
Net increase in time deposits                   2,744,918      2,428,493      5,449,345
Decrease in other assets                          313,400        526,987      1,498,525
Exercise of stock options                         100,000        118,373              0
Repurchase of common stock                       (221,198)       (55,288)       (70,426)
Dividends paid                                   (647,430)      (638,074)      (636,576)
- ----------------------------------------------------------------------------------------
Net cash provided by financing activities       9,466,930      5,210,668      8,180,361
Net increase in cash and cash equivalents       2,405,500      2,740,712      7,151,461
- ----------------------------------------------------------------------------------------
Cash and cash equivalents at the              
  beginning of the year                        19,168,515     16,427,803      9,246,342
- ----------------------------------------------------------------------------------------
Cash and cash equivalents at the end of year  $21,574,015    $19,168,515    $16,427,803
- ----------------------------------------------------------------------------------------

RECONCILIATION OF NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES:

Net income                                     $1,708,154     $1,411,871     $1,315,507
Adjustments to reconcile net income to
  net cash provided by operating activities:
Depreciation and amortization                     194,887        141,061        142,154
Provision for loan losses                         270,000        125,000        415,000
(Increase) decrease in interest receivable       (161,978)        45,134        (14,808)
Increase (decrease) in unearned loan fees         (38,095)        20,220         25,249
Increase (decrease) in accrued interest payable    38,983        (32,764)       159,903
(Increase) decrease in prepaid expenses            32,733        (20,114)       (33,272)
Increase (decrease) in accounts payable           126,921        (26,687)           367
Increase (decrease) in income taxes payable      (109,144)      (318,671)      (182,834)
- ----------------------------------------------------------------------------------------
Total adjustments                                 354,307        (68,821)       511,759
- ----------------------------------------------------------------------------------------
Net cash provided by operating activities      $2,062,461     $1,343,050     $1,827,266
- ----------------------------------------------------------------------------------------

</TABLE>

The accompanying notes are an integral part of these consolidated financial 
statements.

<PAGE>

                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

TO THE SHAREHOLDERS AND BOARD OF DIRECTORS OF SUMMIT BANCSHARES, INC.:

We have audited the consolidated statement of financial condition of Summit 
Bancshares, Inc. (the Company) as of December 31, 1997, and the related 
consolidated statements of income, shareholders' equity and cash flows for 
the year then ended. These financial statements are the responsibility of the 
Company's management. Our responsibility is to express an opinion on these 
financial statements based on our audit. The financial statements of the 
Company as of December 31, 1996, for the years ended December 31, 1995, and 
1994, were audited by other auditors, whose report, dated January 10, 1997, 
expressed an unqualified opinion on these statements.

We conducted our audit in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statements are free 
of material misstatement. An audit includes examining, on a test basis, 
evidence supporting the amounts and disclosures in the financial statements. 
An audit also includes assessing the accounting principles used and 
significant estimates made by management, as well as evaluating the overall 
financial statement presentation. We believe that our audit provides a 
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in 
all material respects, the financial position of Summit Bancshares, Inc., and 
subsidiary at December 31, 1997, and the results of their operations and 
their cash flows for the years then ended, in conformity with generally 
accepted accounting principles.




San Francisco, California
January 20, 1998


<PAGE>

                              SUMMIT EQUITIES. INC.
                              (PARENT COMPANY ONLY)
                                DECEMBER 31, 1997

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

ASSETS
- ------------
- ------------

<TABLE>
<CAPTION>

<S>                                       <C>                 <C>
CASH                                                          $10,864.21

             TOTAL ASSETS                                     $10,864.21
             ------------                                     ----------
             ------------                                     ----------

LIABILITIES AND SHAREHOLDERS EQUITY 
- ----------------------------------- 
- ----------------------------------- 

LIABILITIES
- ------------
- ------------


RESERVE FOR FED TAXES                     $     0.00
RESERVE FOR STATE TAXES                   $     0.00
TOTAL RESERVE FOR TAXES                                       $     0.00
                                                              ----------

             TOTAL LIABILITIES                                $     0.00
             -----------------                                
             -----------------                                

SHAREHOLDERS EQUITY
- -------------------
- -------------------

COMMON STOCK                              $10,000.00
RETAINED EARNINGS                         $   864.21
PROFIT/LOSS YEAR-TO-DATE                  $     0.00
                                          ----------
                                          $10,864.21


             TOTAL SHAREHOLDERS EQUITY                        $10,864.21
             -------------------------                        ----------


             TOTAL LIABILITIES &
             SHAREHOLDERS EQUITY                              $10,864.21
             -------------------                              ----------
             -------------------                              ----------

</TABLE>


<PAGE>

                              SUMMIT EQUITIES, INC.
                              (PARENT COMPANY ONLY)
                                DECEMBER 31, 1997

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

<TABLE>
<CAPTION>

<S>                                       <C>                  <C>
INCOME
- ------------
- ------------

INTEREST INCOME - MMA & TCD               $0.00
INTEREST INCOME - LOANS                   $0.00
OTHER INCOME                              $0.00
                                          -----

             TOTAL INCOME                                     $0.00
             ------------
             ------------
EXPENSE
- -------
- -------

 BUILDING DEPRECIATION                    $0.00
ANNUAL REPORT & MEETING EXPENSE           $0.00
MISCELLANEOUS EXPENSE                     $0.00
LEGAL                                     $0.00
PROPERTY/TAXES                            $0.00
                                          -----

             TOTAL EXPENSES                                   $0.00
             --------------                                   -----
             --------------      

             INCOME BEFORE TAXES &
             EARNINGS OF SUBSIDIARY                           $0.00
             ----------------------
             ----------------------

PROVISION FOR TAXES
- -------------------
- -------------------

 FEDERAL INCOME TAX PROVISION             $0.00
 STATE INCOME TAX PROVISION               $0.00
                TOTAL TAX PROVISION                           $0.00
                                                              -----
             NET INCOME                                       $0.00
             ----------                                       -----
             ----------                                       -----

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                         8664015
<INT-BEARING-DEPOSITS>                         5644000
<FED-FUNDS-SOLD>                              12910000
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                          0
<INVESTMENTS-CARRYING>                        12496651
<INVESTMENTS-MARKET>                          12515656
<LOANS>                                       62070871
<ALLOWANCE>                                    1238012
<TOTAL-ASSETS>                               104341531
<DEPOSITS>                                    90431742
<SHORT-TERM>                                         0
<LIABILITIES-OTHER>                            1031120
<LONG-TERM>                                          0
                                0
                                          0
<COMMON>                                       3709145
<OTHER-SE>                                     9169524
<TOTAL-LIABILITIES-AND-EQUITY>               104341531
<INTEREST-LOAN>                                6726641
<INTEREST-INVEST>                              1670351
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                               8396992
<INTEREST-DEPOSIT>                             1940052
<INTEREST-EXPENSE>                             1940052
<INTEREST-INCOME-NET>                          6456940
<LOAN-LOSSES>                                   270000
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                3738525
<INCOME-PRETAX>                                2964010
<INCOME-PRE-EXTRAORDINARY>                     1708154
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   1708154
<EPS-PRIMARY>                                     3.97
<EPS-DILUTED>                                     3.72
<YIELD-ACTUAL>                                    7.45
<LOANS-NON>                                     176000
<LOANS-PAST>                                       408
<LOANS-TROUBLED>                                   584
<LOANS-PROBLEM>                                    100
<ALLOWANCE-OPEN>                               1070318
<CHARGE-OFFS>                                   105306
<RECOVERIES>                                      3000
<ALLOWANCE-CLOSE>                              1238012
<ALLOWANCE-DOMESTIC>                           1238012
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0
        

</TABLE>


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