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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. 10)
                                     ------
                             20th Century Industries

                                (Name of Issuer)

                        Common Stock, Without Par Value

                         (Title of Class of Securities)

                                   901272 20 3

                                 (CUSIP Number)

                         Florence Davis, General Counsel
                       American International Group, Inc.
                  70 Pine Street, NYC, NY 10270 (212) 770-7000



            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                 July 27, 1998

             (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-1(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.








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CUSIP NO. 901272 20 3


 (1)  NAME OF REPORTING PERSON/S.S. OR I.R.S.
      IDENTIFICATION NO. OF ABOVE PERSON

American International Group, Inc.
(I.R.S. Identification No. 13-2592361)

 (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                              (a)  / /
                              (b)  / /

 (3)  SEC USE ONLY


 (4)  SOURCES OF FUNDS

            WC, OO

 (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) OR 2(e)
                                   / /

 (6)  CITIZENSHIP OR PLACE OF ORGANIZATION

      Incorporated in the State of Delaware


NUMBER OF               (7)  SOLE VOTING POWER
SHARES                          
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                        44,261,523
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                                44,261,523

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                44,261,523

(12)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
                                   / /

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

       50.5%

(14)  TYPE OF REPORTING PERSON

      HC, CO


                                 -2-
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CUSIP NO. 901272 20 3



 (1)  NAME OF REPORTING PERSON/S.S. OR I.R.S.
      IDENTIFICATION NO. OF ABOVE PERSON

American Home Assurance Company
(I.R.S. Identification No. 13-5124990)

 (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                              (a)  / /
                              (b)  / /

 (3)  SEC USE ONLY


 (4)  SOURCES OF FUNDS

            OO

 (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) OR 2(e)
                                   / /

 (6)  CITIZENSHIP OR PLACE OF ORGANIZATION

      Incorporated in the State of New York


NUMBER OF               (7)  SOLE VOTING POWER
SHARES
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                       11,160,966
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                               11,160,966

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                               11,160,966

(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

      IC, CO


                                 -3-
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CUSIP NO. 901272 20 3


 (1)  NAME OF REPORTING PERSON/S.S. OR I.R.S.
      IDENTIFICATION NO. OF ABOVE PERSON

Commerce & Industry Insurance Company
(I.R.S. Identification No. 31-1938623)

 (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                              (a)  / /
                              (b)  / /

 (3)  SEC USE ONLY


 (4)  SOURCES OF FUNDS

            OO

 (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) OR 2(e)
                                   / /

 (6)  CITIZENSHIP OR PLACE OF ORGANIZATION

      Incorporated in the State of New York


NUMBER OF               (7)  SOLE VOTING POWER
SHARES
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                        5,414,828
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                                5,414,828

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                5,414,828

(12)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
                                   / /

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

      6.2%

(14)  TYPE OF REPORTING PERSON

      IC, CO


                                 -4-



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CUSIP NO. 901272 20 3


 (1)  NAME OF REPORTING PERSON/S.S. OR I.R.S.
      IDENTIFICATION NO. OF ABOVE PERSON

New Hampshire Insurance Company
(I.R.S. Identification No. 02-0172170)

 (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                              (a)  / /
                              (b)  / /

 (3)  SEC USE ONLY


 (4)  SOURCES OF FUNDS

            OO

 (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) OR 2(e)
                                   / /

 (6)  CITIZENSHIP OR PLACE OF ORGANIZATION

      Incorporated in the State of Pennsylvania


NUMBER OF               (7)  SOLE VOTING POWER
SHARES
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                        5,414,828
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                                5,414,828

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                5,414,828

(12)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
                                   / /

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

      6.2%

(14)  TYPE OF REPORTING PERSON

      IC, CO


                                 -5-
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CUSIP NO. 901272 20 3


 (1)  NAME OF REPORTING PERSON/S.S. OR I.R.S.
      IDENTIFICATION NO. OF ABOVE PERSON

National Union Fire Insurance Company of Pittsburgh, Pa.
(I.R.S. Identification No. 25-0687550)

 (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                              (a)  / /
                              (b)  / /

 (3)  SEC USE ONLY


 (4)  SOURCES OF FUNDS

            WC, OO

 (5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) OR 2(e)
                                   / /

 (6)  CITIZENSHIP OR PLACE OF ORGANIZATION

      Incorporated in the State of Pennsylvania



NUMBER OF               (7)  SOLE VOTING POWER
SHARES
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                       22,270,901   
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                               22,270,901    



(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                               22,270,901    



(12)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
                                   / /


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

        25.4%

(14)  TYPE OF REPORTING PERSON

      IC, CO


                                 -6-
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ITEM 1.  SECURITY AND ISSUER.

            This Amendment No. 10 amends and supplements Items 4 and 5 of the
Statement on Schedule 13D dated December 16, 1994, as amended and supplemented
by Amendment No. 1 to Schedule 13D dated March 23, 1995, Amendment No. 2 to
Schedule 13D dated January 20, 1998, Amendment No. 3 to Schedule 13D dated
April 9, 1998, Amendment No. 4 to Schedule 13D dated May 12, 1998, Amendment
No. 5 to Schedule 13D dated June 4, 1998, Amendment No. 6 to Schedule 13D dated
June 15, 1998, Amendment No. 7 to Schedule 13D dated June 25, 1998, Amendment 
No. 8 to Schedule 13D dated July 14, 1998 and Amendment No. 9 to Schedule 13D
dated July 23, 1998 ("Schedule 13D"), previously filed by American 
International  Group, Inc., a Delaware corporation ("AIG"), relating to the 
common stock,  without par value ("Common Stock"), of 20th Century Industries, 
a California  corporation (the "Company"). The principal executive offices of 
the Company are located at Suite 700, 6301 Owensmouth Avenue, Woodland Hills, 
California 91367.              

            Each capitalized term used in this statement which is defined in the
Schedule 13D shall have the meaning ascribed thereto in the Schedule 13D.


ITEM 4.  PURPOSE OF TRANSACTION


            On July 27, 1998, AIG exercised the Series A Warrants and converted
224,750 shares of the Series A Preferred Stock. As of July 28, 1998, AIG owns
in excess of 50 percent of the Common Stock, thereby allowing AIG to account
for its investment in the Company on a consolidated basis.


ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

         (a) Between July 23, 1998 and July 28, 1998, AIG, through its
subsidiary American Home, purchased 240,200 shares of Common Stock in open
market transactions effected on the New York Stock Exchange at prices ranging
from $26.6250 to $27.00 per share.

         American Home's and each other AIG Sub's current ownership interests
in the Company and the Common Stock are as shown in the following table:  
        

                                 -7-
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Number of Percentage of Shares of Fully Diluted Common Stock Shares of Company Obtainable Upon Common Stock (and state of Conversion/ Outstanding domicile) Number of Shares Exercise (1) - --------------- ---------------- -------------- ------------ American Home 200 shares of 17,653 .02% Assurance Company Series A Preferred (New York) Stock (2) 11,143,313 -- 12.72 shares of Common Stock (3) Commerce & 5,414,828 shares of -- 6.18 Industry Common Stock (2) Insurance Company (New York) New Hampshire 5,414,828 shares of -- 6.18 Insurance Company Common Stock (2) (Pennsylvania) National Union 22,270,901 shares -- 25.43 Fire Insurance of Common Stock (4) Company of Pittsburgh, Pa. (Pennsylvania) ------ Total Common Shares 44,261,523 50.54
- ----------------- (1) Based on the number of shares of Common Stock outstanding as of June 30, 1998 (51,728,381 shares) as reported by the Company in its Press Release dated July 27, 1998, as adjusted to give effect to the issuance of shares of Common Stock issued on conversion of 224,750 shares of Series A Preferred Stock and on exercise of the 16 million Series A Warrants and issuable on conversion of the 200 shares of Series A Preferred Stock which remain outstanding. -8- 9 (2) The number of shares of Series A Preferred Stock owned by the AIG Subs is 200 after conversion of 102,050 shares, 61,350 shares and 61,350 shares of Series A Prefferred Stock by American Home, Commerce & Industry and New Hampshire, respectively, on July 27, 1998. The number of shares of Common Stock obtainable upon conversion of the 200 shares of Series A Preferred Stock remaining outstanding is 17,653 (or .02% of fully converted shares). (3) American Home purchased 298,000 shares of Common Stock prior to November, 1991. American Home purchased 547,400 shares of Common Stock in open market transactions effected on the New York Stock Exchange between April 23, 1998 and May 12, 1998 and 1,050,653 shares of Common Stock in open market transactions effected on the New York Stock Exchange between June 16, 1998 and July 7, 1998. American Home purchased an additional 240,200 Shares of Common Stock in open market transactions effected on the New York Stock Exchange as follows:
DATE SHARES PRICE July 23, 1998 17,500 $27.0000 July 24, 1998 6,500 $27.0000 July 27, 1998 62,800 $27.0000 July 28, 1998 113,200 $27.0000 '' 40,200 $26.6250
-9- 10 (4) National Union purchased 602,000 shares of Common Stock prior to June, 1994. National Union purchased an additional 557,500 shares of Common Stock in open market transactions effected on the New York Stock Exchange between May 13, 1998 and June 4, 1998 and 535,400 shares of Common Stock in open market transactions effected on the New York Stock Exchange between June 5, 1998 and June 15, 1998. In addition, National Union purchased 4,376,001 shares of Common Stock under the Stock Purchase Agreement on July 14, 1998 and 200,000 shares of Common Stock thereunder on July 15, 1998. (b). AIG and each AIG Sub share voting and dispositive power as to the securities owned by such AIG Sub. (c). AIG, American Home, Commerce and Industry, National Union, New Hampshire, SICO, The Starr Foundation and Starr, and, to the best of each of their knowledge, the Covered Persons, have not engaged in any transactions in the Common Stock within the past 60 days, except for (i) the purchase by American Home between May 29, 1998 and July 28, 1998 of 1,290,853 shares of Common Stock as described above in footnote (3) and (ii) the purchase by National Union between May 29, 1998 and July 15, 1998, of 739,900 shares of Common Stock, the purchase of 4,376,001 shares of Common Stock pursuant to the Stock Purchase Agreement on July 14, 1998 and the purchase of 200,000 shares of Common Stock thereunder by AIG through National Union on July 15, 1998 as described above in footnote (4). (d) and (e). Not applicable. -10- 11 SIGNATURE 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. Dated: July 29, 1998 AMERICAN INTERNATIONAL GROUP, INC. By: /s/ Kathleen E. Shannon --------------------------------------- Kathleen E. Shannon, Vice President, Secretary and Associate General Counsel AMERICAN HOME ASSURANCE COMPANY By: /s/ Edward E. Matthews --------------------------------------- Edward E. Matthews, Senior Vice President COMMERCE AND INDUSTRY INSURANCE COMPANY By: /s/ Edward E. Matthews --------------------------------------- Edward E. Matthews, Senior Vice President NATIONAL UNION FIRE INSURANCE COMPANY OF PITTSBURGH, PA. By: /s/ Edward E. Matthews --------------------------------------- Edward E. Matthews, Senior Vice President NEW HAMPSHIRE INSURANCE COMPANY By: /s/ Edward E. Matthews --------------------------------------- Edward E. Matthews, Vice President -11-