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Rule 497(j)
Reg. No. 33-13906
Pursuant to Rule 497(j) promulgated under the Securities Act of
1933, the Registrant, National Municipal Trust, Insured Series
27 (10-15 Year Average Maturity Program) hereby certifies as
follows:
1) the form of prospectus that would have been filed under
paragraph (b) of Rule 497 does not differ from that con-
tained in the most recent amendment to the registration
statement, and
2) the text of the said amendment to the registration state-
ment has been filed electronically.
NATIONAL MUNICIPAL TRUST
INSURED SERIES 27
(10-15 Year Average Maturity
Program)
(Registrant)
By: Prudential Securities
Incorporated
Kenneth Swankie
Kenneth Swankie
Senior Vice President
Authorized Signatory
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D. C. 20549
