Exhibit 99.1
                                                                   Tiffany & Co.
                                                             Report on Form 10-K



Certification Required by 18 U.S.C. Section 1350
(as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)
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     In connection with the Annual Report of Tiffany & Co. (the "Company") on
Form 10-K for the period ended January 31, 2003, as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), I, Michael J.
Kowalski, as Chairman and Chief Executive Officer of the Company, certify,
pursuant to 18 U.S.C. ss 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d)
of the Securities Exchange Act of 1934; and

2.  The information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.


Dated: April 8, 2003


                                            /s/ MICHAEL J. KOWALSKI
                                      ------------------------------------
                                               Michael J. Kowalski
                                      Chairman and Chief Executive Officer