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

Soviet Union 1941-91

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Start price: $500

Buyer's premium:

1980, 60th Anniversary of Azerbaijan Soviet Republic, 4k multicolored, left sheet margin horizontal imperforate pair, full OG, NH, VFand very scarce, Est. $1,000-$1,200, Scott #4821 imp