United States First Flight Cover. Cover reads: "First Direct Flight - AM 19. Washington-Atlantic City, July 20, 1931 - Cachet Sponsored by Washington DC Merchants and Manufacturers Association." Sent from Washington DC on July 20, 1931 at 3:30PM. Addressed to Baltimore, Maryland - Care of postmaster. Received in Baltimore, Maryland on July 21, 1931. Nice steam train cachet!