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

Soviet Union 1941-91

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Start price: $100

Buyer's premium:

1947, Kirov Sanatorium, 30k bright ultramarine, right sheet margin horizontal pair, imperforate between stamps and on the right, full OG, NH, VF, Est. $200-$250, Scott #1168 var