USA to Canada & Canada to USA, Rocket Mail over the Niagra Falls on May 1936 .
Mailing was held in conjunction with the 3rd International Philatelic Exhibition being held in New York city -May 1936.
Envelope cancellations:
United states of America to Canada !.
Tag on envelope:
By rocket par fusee.
Additional single stamped cancellation reads :
Rocket-start-niagra-falls.
Scene on stamps depicts a rocket flying over the niagra falls from the usa to canada.
Envelope cancellations read :
Canada to United States of America
Tag on envelope reads :
By rocket par fusee.
Additional single stamped cancellation reads :
Rocket-start-niagra-falls.
Scene on stamps depicts a rocket flying over the niagra falls from the Canada to USA.
Niagara Falls, set of 2, souvenir cover.
These Items are listed in the Elligton Zwisler U.S. Rocket Mail Catalog # 9A1 and 9D1.