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

Soviet Union 1923-91

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Start price: $300

Buyer's premium:

1944, Day of the United Nations, trial printings of 60k and 3r, complete set of two with extra gold color, full OG, NH, VF and rare in complete set, Est. $500-$600, Scott #921-22