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

Soviet Union

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Start price: $500

Buyer's premium:

1980, 60th Anniversary of Azerbaijan Soviet Republic, 4k multicolored, left sheet margin horizontal imperforated pair, full OG, NH, VF and very scarce, Est. $800-$1,000, Scott #4821 imp