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: $150

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1961, definitive issue, Monument Worker and Peasant, 10k orange, bottom right corner sheet margin block of four with strongly misplaced vertical and horizontal perforations, full OG with minor black ink soiling, NH, VF and very scarce, Est. $250-$300, Sc. #2446 var