PRECISION OPTICS CORPORATION INC
SC 13D/A, 1999-12-13
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                         UNITED STATES
              SECURITIES AND EXCHANGE COMMISSION
                    Washington, D.C.  20549

                          SCHEDULE 13D

            Under the Securities Exchange Act of 1934
                    (Amendment No. __1__)*

               Precision Optics Corporation, Inc.
      ______________________________________________________
                        (Name of Issuer)

               Common Stock, $ .01 Par Value
      ______________________________________________________
                 (Title of Class of Securities)

                         740294103
               ____________________________________
                         (CUSIP Number)
     Austin W. Marxe, 153 East 53rd Street, New York, NY 10022
                    (212) 207-6500
      ______________________________________________________
     (Name, Address and Telephone Number of Person Authorized to
               Receive Notices and Communications)

                    November 19, 1999
     _________________________________________________________
     (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule
13G to report the acquisition which is the subject of this
Schedule 13D, and is filing this schedule because of Rule 13d-
I(b)(3) or (4), check the following box --_.

Note: Six copies of this statement, including all exhibits,
should be filed with the Commission.  See Rule 13d-1(a) for other
parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect to
the subject class of securities, and for any subsequent amendment
containing information which would alter the disclosures provided
in a prior cover page.

The information required in the remainder of the cover page shall
not be deemed to be "filed" for the purpose of Section 18 of the
Securities Exchange Act of 1934 ("Act") or otherwise subject to
the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).




                         SCHEDULE 13D
CUSIP No.740294103                   Page  2  of 10 Pages
- ----------------------------------------------------------------
(1)  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Special Situations Fund III, L.P.
     F13-3737427
     MGP Advisers Limited Partnership *
     F13-3263120
- ----------------------------------------------------------------
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*  (a) | |
                                                        (b) |X|
- ----------------------------------------------------------------
(3)  SEC USE ONLY

- ----------------------------------------------------------------
(4)  SOURCE OF FUNDS*   00
________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED
PURSUANT TO 2(d) OR 2(e)                               ____
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
     Delaware
- ----------------------------------------------------------------
 NUMBER OF     (7) SOLE VOTING POWER   See Marxe/Greenhouse
  SHARES       -------------------------------------------------
BENEFICIALLY   (8) SHARED VOTING POWER             None
 OWNED BY      -------------------------------------------------
   EACH        (9) SOLE DISPOSITIVE POWER  See Marxe/Greenhouse

 REPORTING     -------------------------------------------------
PERSON WITH    (10) SHARED DISPOSITIVE POWER        None
- ----------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICALLY OWNED BY EACH REPORTING PERSON
       749,400 (includes 375,000 warrants)
- ----------------------------------------------------------------
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
- ----------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      9.3
- ----------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*
     IV/IA
- ----------------------------------------------------------------
* AWM Investment Company, Inc., a Delaware corporation is the
General Partner of this entity.






                    SCHEDULE 13D
CUSIP No.740294103                           Page 3 of 10 Pages
- ----------------------------------------------------------------
(1)  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Special Situations Private Equity Fund, L.P.
     F13-3916551
     MG Advisers, L.L.C.  F13-3916549
- ----------------------------------------------------------------
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*  (a) | |
                                                        (b) |X|
- ----------------------------------------------------------------
(3)  SEC USE ONLY

- ----------------------------------------------------------------
(4)  SOURCE OF FUNDS* 00
________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED
PURSUANT TO 2(d) OR 2(e)                               ____
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
     Delaware
- ----------------------------------------------------------------
 NUMBER OF     (7) SOLE VOTING POWER  See Marxe/Greenhouse
  SHARES       -------------------------------------------------
BENEFICIALLY   (8) SHARED VOTING POWER             None
 OWNED BY      -------------------------------------------------
   EACH        (9) SOLE DISPOSITIVE POWER  See Marxe/Greenhouse
 REPORTING     -------------------------------------------------
PERSON WITH    (10) SHARED DISPOSITIVE POWER        None
- ----------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICALLY OWNED BY EACH REPORTING PERSON
      1,054,000 (includes 582,500 warrants)
- ----------------------------------------------------------------
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*

- ----------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      12.7
- ----------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*

     IV/IA
- ----------------------------------------------------------------








                    SCHEDULE 13D
CUSIP No.740294103                           Page 4 of 10 Pages
- ----------------------------------------------------------------
(1)  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Special Situations Cayman Fund, L.P.
     98-0132442
     AWM Investment Company, Inc.  11-3086452
- ----------------------------------------------------------------
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*  (a) | |
                                                        (b) |X|
- ----------------------------------------------------------------
(3)  SEC USE ONLY

- ----------------------------------------------------------------
(4)  SOURCE OF FUNDS*  00
________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED
PURSUANT TO 2(d) OR 2(e)                               ____
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
     Cayman Islands
- ----------------------------------------------------------------
 NUMBER OF     (7) SOLE VOTING POWER  See Marxe/Greenhouse
  SHARES       -------------------------------------------------
BENEFICIALLY   (8) SHARED VOTING POWER             None
 OWNED BY      -------------------------------------------------
   EACH        (9) SOLE DISPOSITIVE POWER See Marxe/Greenhouse
  REPORTING     ------------------------------------------------
PERSON WITH    (10) SHARED DISPOSITIVE POWER        None
- ----------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICALLY OWNED BY EACH REPORTING PERSON
      242,500 (includes 125,000 warrants)
- ----------------------------------------------------------------
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*

- ----------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     3.1
- ----------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*
     IV/IA
- ----------------------------------------------------------------









                    SCHEDULE 13D
CUSIP No.740294103                           Page 5 of 10 Pages
- ----------------------------------------------------------------
(1)  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Special Situations Technology Fund, L.P.
     13-3937585
     SST Advisers LLC   13-3937583
- ----------------------------------------------------------------
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*  (a) | |
                                                        (b) |X|
- ----------------------------------------------------------------
(3)  SEC USE ONLY

- ----------------------------------------------------------------
(4)  SOURCE OF FUNDS* 00
________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED
PURSUANT TO 2(d) OR 2(e)                               ____
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
     United States of America
- ----------------------------------------------------------------
 NUMBER OF     (7) SOLE VOTING POWER    See Marxe\Greenhouse
  SHARES       -------------------------------------------------
BENEFICIALLY   (8) SHARED VOTING POWER             None
 OWNED BY      -------------------------------------------------
   EACH        (9) SOLE DISPOSITIVE POWER  See Marxe\Greenhouse

 REPORTING     -------------------------------------------------
PERSON WITH    (10) SHARED DISPOSITIVE POWER        None
- ----------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICALLY OWNED BY EACH REPORTING PERSON
      416,000 (includes 188,500 warrants)
- -----------------------------------------------------------------
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*

- ----------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

       5.3
- ----------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*

     IN
- ----------------------------------------------------------------






                    SCHEDULE 13D
CUSIP No.740294103                           Page 6 of 10 Pages
- ----------------------------------------------------------------
(1)  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Austin W. Marxe
     David M. Greenhouse
- ----------------------------------------------------------------
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*  (a) | |
                                                        (b) |X|
- ----------------------------------------------------------------
(3)  SEC USE ONLY

- ----------------------------------------------------------------
(4)  SOURCE OF FUNDS* 00
________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED
PURSUANT TO 2(d) OR 2(e)                               ____
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
     United States of America
- ----------------------------------------------------------------
 NUMBER OF     (7) SOLE VOTING POWER        2,461,900
  SHARES       -------------------------------------------------
BENEFICIALLY   (8) SHARED VOTING POWER             None
 OWNED BY      -------------------------------------------------
   EACH        (9) SOLE DISPOSITIVE POWER    2,461,900
 REPORTING     -------------------------------------------------
PERSON WITH    (10) SHARED DISPOSITIVE POWER        None
- ----------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICALLY OWNED BY EACH REPORTING PERSON
      2,461,900 (includes   896,000 warrants)
- -----------------------------------------------------------------
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*

- ----------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

   28.7
- ----------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*

     IN
- ----------------------------------------------------------------








                                        Page 7 of 10 Pages

Item 1.   Security and Issuer.  This Schedule relates to the
          common stock and warrrants of Precision Optics
          Corporation ("Issuer").  The Issuer's principal
          executive offices are located at 22 East Broadway,
          Gardner, MA  01440-3338.

Item 2.   Identity and Background.  This Schedule is filed on
          behalf of (i) Special Situations Fund III, L.P., a
          Delaware limited partnership ("SSF III"); (ii) Special
          Situations Private Equity Fund, L.P., a Delaware
          limited partnership ("SSPE"); (iii) Special Situations
          Cayman Fund, L.P., a Cayman Islands limited partnership
          ("CAY"); (iv) Special Situation Technology Fund, L.P.,
          a Delaware limited partnership ("SST");(v) MGP Advisers
          Limited Partnership , a Delaware limited partnership
          ("MGP"); (vi) MG Advisers. L.L.C., a New York limited
          liability company ("MG"); (vii) AWM Investment Company,
          Inc., a Delaware corporation ("AWM"); (viii) SST
          Advisers L.L.C., a Delaware limited liability company
          ("SSA"); (ix) Austin W. Marxe and (x) David Greenhouse.
          Each of the foregoing is hereinafter referred to,
          individually, as a "Reporting Person" and,
          collectively, as the "Reporting Persons."

          The principal office and business address of the
          Reporting Persons, other than the Cayman Fund, is 153
          East 53rd Street, 51st floor, New York, NY  10022.  The
          principal office and business address of the Cayman
          Fund is c/o CIBC Bank and Trust Company (Cayman)
          Limited, CIBC Bank Building, P. O. Box 694, Grand
          Cayman, Cayman Islands, British West Indies.

          The principal business of SSF III, the Private Equity
          Fund, the Cayman Fund, and SST (individually, a "Fund"
          and, collectively, the "Funds") is to invest in equity
          and equity related securities.  The principal business
          of MGP is to act as the general partner of and the
          investment adviser to SSF III.  The principal business
          of MG is to act as general partner of and the
          investment adviser to the Private Equity Fund. The
          principal business of AWM is to act as the general
          partner of MGP and as the general partner of and the
          investment adviser to the Cayman Fund. The principal
          business of SSA is to act as the general partner of
          SST.   MGP, MG, AWM, and SST are referred to herein,
          individually, as an "Adviser" and, collectively, as the
          "Advisers."  The principal occupation of Austin W.
          Marxe and David Greenhouse, both of whom are United
          States citizens, is to serve as officers, directors and
          members or principal shareholders of the Advisers.


                                        Page 8 of 10 Pages

          Neither any Fund, any Adviser, Austin W. Marxe nor
          David Greenhouse, during the last 5 years, has been
          convicted in any criminal proceeding or was or is
          subject to a judgement, decree or final order enjoining
          future violations of, or prohibiting or mandating
          activities subject to, Federal or state securities laws
          or finding any violations with respect to such laws.

Item 3.   Source and Amount of Funds or Other Consideration.
          Each Fund utilized available cash assets to purchase
          the Securities.

Item 4.   Purpose of the Transaction.  Each of the Reporting
          Persons has acquired and is holding the Securities
          solely for investment purposes and not with the purpose
          or the effect of changing or influencing control of the
          Issuer.  Each Fund acquired the Securities in the
          ordinary course of business and is holding such
          Securities for the benefit of its third party
          investors.

Item 5.   Interest in Securities of the Issuer.  See pps. 2-5 of
          this Schedule, setting forth the aggregate number and
          percentage of the Securities beneficially owned by each
          Reporting Person, the number of shares as to which
          there is sole or shared power to vote, or to direct the
          vote, and sole or shared power to dispose or to direct
          the disposition.

          During the past (60) days, the following Funds effected
          the following transactions:

          SSF III - During November 1999, the Fund sold in open
          market transactions an aggregate of 330,100 shares at
          an average price of $3.31 per share.
          SSPE -  During October 1999, the Fund sold in open
          market transactions an aggregate of 25,000 shares at an
          average price of $1.49 per share.
          During November 1999, the Fund sold in open market
          transactions an aggregate of 371,000 shares at an
          average price of $2.91 per share.
          During November 1999, the Fund exercised warrants for
          an aggregate of 142,500 shares at an exercise price of
          $4.00 per share.
          CAY - During November 1999, the Fund sold in open
          market transactions 7,500 shares at a price of $4.35
          per share.





                                        Page 9 of 10 Pages

          SST - During November 1999, the Fund sold in open
          market transactions an aggregate of 134,000 shares at
          an average price of $2.92 per share.
          During November 1999, the Fund exercised warrants for
          an aggregate of 47,500 shares at an exercise price of
          $4.00 per share.

          During the month of July 1999, SSF III sold 700 shares
          at an average price of $1.044 per share.


Item 6.   Contracts, Arrangements, Understandings or
          Relationships with Respect to Securities of the Issuer.
          See Item 2 and Item 4 of this Schedule.  Based on such
          Items. Messrs. Marxe and Greenhouse maintain sole
          voting power and sole dispositive power with respect to
          the Securities.


Item 7.   Material to be Filed as Exhibits.
          None


          After reasonable inquiry and to the best of my
          knowledge and belief, I certify that the information
          set forth in this statement is true, complete and
          correct.


December 9, 1999

                    /s/ Austin W. Marxe
                    -----------------------------
                     Special Situations Fund III, L.P.
                    by: Austin W. Marxe, Managing Director


                    /s/ Austin W. Marxe
                    _________________________________
                    Special Situaitons Private Equity Fund, L.P.
                    by: Austin W. Marxe, Managing Director


                    /s/ Austin W. Marxe
                    _____________________________
                    Special Situations Cayman Fund,L.P.
                    by: Austin Marxe, Managing Director






                                        Page 10 of 10 Pages



                    /s/ Austin W. Marxe
                    _____________________________
                    Special Situations Technology Fund,L.P.
                    by: Austin Marxe, Managing Director




                    /s/ Austin W. Marxe
                    _____________________________
                    MGP Advisers Limited Partnership
                    by: Austin Marxe, President and CEO



                    /s/ Austin W. Marxe
                    _____________________________
                    MG Advisers, L.L.C.
                    by: Austin Marxe, President and CEO




                    /s/ Austin W. Marxe
                    _____________________________
                    AWM Investment Company, Inc.
                    by: Austin Marxe, President and CEO




                    /s/ Austin W. Marxe
                    _____________________________
                    SST Advisers, L.L.C.
                    by: Austin Marxe, President and CEO



                    /s/ Austin W. Marxe
                    _____________________________
                    Austin W. Marxe



                    /s/ David Greenhouse
                    _____________________________
                    David Greenhouse











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