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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1965, Alexey Leonov, The First Man Walking in Space, 10k dark ultra and orange, two imperforated sheets of 40 (4×10), full OG, NH and CTO, VF, Est. $250-$300 , Sc. #3015 imp