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

Buyer's premium:

1925, 20th Anniversary of the Revolution of 1905, 3k olive green, comb perforation 12×12½, complete sheet of 40 (8×5), fresh and unfolded, full OG, NH, VF, Est $300-$400, Scott #339 var