Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Russian Air Post Stamps and Covers

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Start price: $150

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1937, Aviation Exhibition, 10k-1r, complete set of seven and souvenir sheet of four 1r stamps, all arranged on two pages from a Collection, full OG, NH, VF, C.v. $624, Est. $250-$300, Sc. # C69-75, C75a