US First Fligh Cover New York Sent to Bangkok Thailand 1928 US Scott c11.

The product is a used US First Flight Cover sent from New York to Bangkok, Thailand in 1928. It features a 9 cents stamp with the Scott c11 denomination, and a duplex cancellation type. The cover is related to aviation, specifically the event of First Flight. It was issued between 1921-1930 in the United States and has not been certified.