Airmail First Flight Covers
First Flight Covers tell the story of early aviation history. These souvenir covers provide an interesting history of the development of aviation in the early years. The dates of first flights on new routes were published. One could submit a cover, addressed to General Delivery at the flight terminus, with a return address on the back, and a note "Return to Sender". At the originating end of the flight, the post office applied appropriate handstamps and/or cachets. At the receiving end covers were back-stamped to prove they had actually travelled on the designated flight. The result are interesting and historical postal history.