Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 8:
1918 (July 15), First Flight cover New York – Washington, DC from the Aero Club of America with letterhead of the Club, addressed to Major J. C. McCoy, franked by 16c green (new air mail rate started exactly on July 15), violet ”Via Aeroplane Mail”, cover was opened roughly F/VF and rare, especially complete the Aero Club document, Est. $800-$900, Scott #C2
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