Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union 1923-40

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Start price: $150

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1932-33, 15th Anniversary of the October Revolution, 3k- 35k, complete set of eight, including 10k with perf L12½ (2mm horizontal stripe of gum skipped at bottom), full OG, NH, mostly VF, approximate C.v. $480, Scott #472-78, 474 var