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: $100

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1957, Launching of the First Sputnik, 40k indigo on bluish paper and 40k bright blue, two complete sheets of 98 (14×7), folded once along vertical perforation, fresh, full OG, NH, VF, Est. $150-$200 , Sc. #1992-93