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SUPPLEMENT TO THE PROSPECTUS OF
DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
DATED FEBRUARY 28, 1995
The sentences pertaining to the Emerging Markets Portfolio in the subsection
entitled "Portfolio Management" under the subsection entitled "General Portfolio
Techniques" in the section of the Prospectus entitled "INVESTMENT OBJECTIVES AND
POLICIES" are hereby replaced by the following:
Shaun C.K. Chan, Managing Director of TCW Asia Ltd., Robert
J.M. Rawe, President, Managing Director, Chief Executive Officer
and Director of TCW London International, Limited, and Michael
P. Reilly, Senior Vice President of the Sub-Adviser, are the
primary portfolio managers of the EMERGING MARKETS PORTFOLIO
and, with the exception of Mr. Reilly, have been so since the
Fund's inception. Mr. Reilly has been a primary portfolio
manager of the Portfolio since December, 1994. Mr. Chan has been
a portfolio manager with affiliates of The TCW Group, Inc. since
1993, prior to which time he was Director of Wardley Investment
Services (Hong Kong) Ltd. Mr. Rawe has been a portfolio manager
with TCW London International, Limited since August, 1993, prior
to which time he was President and Chief Executive Officer of
Dillon, Read International Asset Management Co. Mr. Reilly has
been a portfolio manager with affiliates of The TCW Group, Inc.
since June, 1992, prior to which time he was Vice President of
Security Pacific Bank.
March 30, 1995
