Smithsonian InstitutionNational Air & Space Museum
Milestones of Flight Commemorative Series#25 3/28/1975
65th Anniversary of First Seaplane Flight
March 28, 1910
with Bouches du Rhone postmark
Pic 1: Envelope showing commemoration and postmark
Pic 2: Insert explaining the commemorative event.
n 2020-09-04