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, Youth Festival, 10k-1r, imperforated complete set of five, all with sheet margins, 60k and 1r – corner sheet margin singles, full OG, NH, VF, C.v. $300, Est. $150-$200 , Sc. #1913/40 imp