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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. 6)
                                     ------
                             20th Century Industries

                                (Name of Issuer)

                        Common Shares, 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)

                                 June 15, 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.








   2
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                         38,394,669
BENEFICIALLY            (8)  SHARED VOTING POWER
OWNED BY                       38,394,669
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                               38,394,669

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                               38,394,669                              

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

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

        43.8%

(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                        9,870,113
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                                9,870,113

(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                9,870,113

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

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

      11.3%

(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                       17,694,900    
EACH                    (9)  SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH            (10)  SHARED DISPOSITIVE POWER
                               17,694,900    



(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                               17,694,900    



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


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

        20.2%

(14)  TYPE OF REPORTING PERSON

      IC, CO


                                 -6-
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ITEM 1.  SECURITY AND ISSUER.

            This Amendment No. 6 amends Item 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 and Amendment No. 5 to Schedule 13D dated
June 4, 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 5.  INTEREST IN SECURITIES OF THE ISSUER.

            (a). Between June 5, 1998 and June 15, 1998, AIG, through its
subsidiary National Union, purchased 535,400 shares of Common Stock in open
market transactions effected on the New York Stock Exchange at prices ranging
from $27.75 to $28.9375 per share. National Union'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 102,250 shares of 9,024,713 10.31% Assurance Company Series A Preferred (New York) Stock (2) 845,400 845,400 0.97 shares of Common Stock (3) Commerce & 61,350 shares of 5,414,828 6.18 Industry Series A Preferred Insurance Company Stock (2) (New York) New Hampshire 61,350 shares of 5,414,828 6.18 Insurance Company Series A Preferred (Pennsylvania) Stock (2) National Union 16 Million Series 16,000,000 18.27 Fire Insurance A Warrants (4) Company of Pittsburgh, Pa. (Pennsylvania) 1,694,900 shares 1,694,900 1.94 of Common Stock (5) ---------- ------ Total Common Shares 38,394,669 43.84
- ----------------- (1) Based on the number of shares of Common Stock outstanding as of April 24, 1998 (51,715,380 shares) as reported by the Company in its Quarterly Report on Form 10-Q for the three month period ended March 31, 1998, as adjusted to give effect to the issuance of shares of Common Stock issuable on full conversion of the 224,950 shares of Series A Preferred Stock and on full exercise of the 16 million Series A Warrants. -8- 9 (2) The aggregate number of shares of Series A Preferred Stock owned by the AIG Subs is 224,950, representing 200,000 shares purchased at the time of the initial investment in December 1994, 20,000 shares purchased in March 1995 when the Investment Agreement was amended and 4,950 shares issued as a pay-in-kind dividend by the Company in 1995. To date, the AIG Subs have not converted any shares of Series A Preferred Stock. The aggregate number of shares of Common Stock obtainable upon full conversion is 19,854,369 (or 22.67% of fully converted shares). (3) American Home purchased 298,000 shares of Common Stock prior to November, 1991. American Home purchased an additional 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. -9- 10 (4) The 16 million Series A Warrants were purchased at the time of the initial investment in December 1994 and to date the AIG Subs have not exercised any Series A Warrants. (5) 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. National Union purchased an additional 535,400 shares of Common Stock in open market transactions effected on the New York Stock Exchange as follows:
DATE NUMBER PRICE June 5, 1998 5,000 $28.5625 " 11,000 $28.6875 June 8, 1998 12,700 $28.875 " 22,300 $28.9375 June 9, 1998 33,700 $28.50 " 6,300 $28.75 " 10,500 $28.875 " 10,500 $28.9375 June 10, 1998 3,400 $28.375 " 500 $28.4375 " 1,600 $28.625 " 6,500 $28.6875 June 11, 1998 10,000 $28.00 " 150,000 $28.0625 " 22,000 $28.9375 June 12, 1998 192,700 $27.75 " 13,700 $27.8125 June 15, 1998 5,000 $28.0625 " 800 $28.125 " 2,000 $28.25 " 1,300 $28.4375 " 900 $28.50 " 13,000 $28.75
(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 the purchase by American Home between April 23, 1998 and May 12, 1998 of 547,400 shares of Common Stock as described above in footnote (3) and the purchase by National Union between May 13, 1998 and June 15, 1998, of 1,092,900 shares of Common Stock as described above in footnote (5). (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: June 15, 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-