Rule 497(j)
Reg. No. 33-29314

Pursuant to Rule 497(j) promulgated under the Securities Act of 1933, the Registrant, National Municipal Trust, Insured Series 43 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 43
(Registrant)

By: Prudential Securities

Incorporated

Kenneth Swankie Kenneth Swankie Authorized Signatory

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D. C. 20549