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

Worldwide Air Post Stamps and Postal History - Soviet Union

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Start price: $150

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1933, Stratostat ”USSR 1”, 5k-20k, complete set of three, post office fresh quality, full OG, NH, VF, C.v. $463, Scott #C37-39