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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1959, Sturgeon Conservation, 40k greenish blue and black, comb perforation 12¼ instead of L12¼, full OG, NH, VF and scarce perforation error, Est. $250-$300 , Sc. #2222 var