Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Soviet Union

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Start price: $100

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1957, Youth Festival in Moscow, 10k-1r, imperforated complete set of five, three stamps with side margins, two – have enlarged selvages, full OG, NH, VF, C.v. $300, Est. $150-$200, Sc. # 1913/40 imp