Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Soviet Union Stamps of 1941-91

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Start price: $250

Buyer's premium:

1988, Antarctic Expedition, 20k multicolored, horizontal imperforated pair, nice margins all around, full OG, NH, VF, Est. $400-$500 , Sc. #5713 imp