Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1

United States - Air Post stamps

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Start price: $150

Buyer's premium:

1923, De Havilland Biplane, 24c carmine, full OG, NH, PSE XF-Sup 95, Spec. Grade C.v. $400, Est. $250-$300, Scott #C6