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

Soviet Union of 1941-91

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Start price: $250

Buyer's premium:

1988, Antarctic Expedition, 20k multicolored, right sheet margin horizontal imperforate pair, nice item in every respect, full OG, NH, VF, Est. $500-$600,Scott #5713 imp