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

Worldwide Air Post Stamps and Postal History - United States

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Start price: $75

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1910 (September 28), black-and-white PPC (two Curtiss Machines in Flight near Hempstead, NY), sent from Mineola, NY, franked by Franklin 1c green with perforation 12, mostly VF, Est. $120-$150, Sc. # 331