Exhibit 10.30

[GRAPHIC OMITTED]
                                WESTAMERICA BANK


SONOMA REGION CREDIT ADMINISTRATION

October 21, 1997

Michael Laybourn, President
Mendocino Brewing Company, Inc.
P.O. Box 400
Hopland, CA 95449

Dear Michael,

     Westamerica  Bank is pleased to commit to the  restructure  of the existing
non-revolving  line of  credit  into a  revolving  line of  credit  prior to the
expiration  date of November 30, 1997.  This commitment is subject to the Bank's
review of the executed  Investment  Agreement between Mendocino Brewing Company,
Inc.  and United  Brewers of America,  Inc. and the  completion  of a collateral
field audit  satisfactory  to Bank.  The basic terms of the credit are  outlined
below:

     1.   Type of Facility:

          Revolving line of credit.

     2.   Maximum Principal Amount:

          $600,000 or the maximum  applicable  Borrowing Base as may change from
          time  to  time,  as  will  be  defined  in the  Credit  Documentation.
          Increases to the line can be  considered  as revenues grow and profits
          return.

     3.   Forms of Utilization:

          Cash advances, including direct deposits to your checking account.

     4.   Interest Rate:

          Westamerica Bank index plus 1.50% floating.

          Interest  will accrue daily on the basis of a  (365/360-day)  year and
          actual days elapsed.

                        31 D STREET . SANTA ROSA CA 95404
                                 (707) 576-3625



Michael Laybourn, President
October 21, 1997
Page 2

     5.   Expiration and/or Maturity Date:
          -------------------------------

          May 31,  1998.  Prior to maturity,  the  December  31, 1997  Financial
          statement will be reviewed by Bank.  Subsequent  line renewals will be
          for one year.

     6.   Borrowing Base:
          --------------

          80% of eligible accounts  receivable (as will be defined in the credit
          documents).

          25% of eligible inventory to a maximum of $200,000 (as will be defined
          in the credit documents).

     7.   Collateral:
          ----------

          Perfected  security  interest  of  first  priority  in  the  following
          personal property: Accounts Receivable and inventory.

     8.   Purpose of Line of Credit:
          -------------------------

          Finance trading assets.

     9.   Fees Payable On or Before Closing:
          ---------------------------------

          Loan Fee: .25% per annum anticipated.

     10.  Repayment:
          ---------

          Interest  payable  (monthly)  with all  accrued  interest  and  unpaid
          principal to be due at maturity.

     11.  Loan Documentation:
          ------------------

          In addition to the  documentation  that will be required in connection
          with the security  interest to be given to Bank in the property  which
          will serve as collateral for this loan,  the following  documentation,
          in form and substance satisfactory to Bank will be required:



Michael Laybourn, President
October 21, 1997
Page 3

         Business Loan Agreement. Among other terms, this agreement will contain
         various financial and other covenants,  agreements and conditions to be
         mutually agreed upon.

     12. Banking Relationship:

         Primary banking relationship must be maintained with Westamerica Bank.

This  commitment  is also  subject  to such  additional  terms,  conditions  and
requirements as may be provided in Bank's credit documents of otherwise required
by Bank or its counsel.

Sincerely,


/s/ Dwight Davenport
Dwight Davenport
Vice President and Manager

DD/ju