Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union 1923-91

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Start price: $75

Buyer's premium:

1957, Youth Festival, 10k-1r, imperforate complete set of five, stamp of 10k has top margin, full OG, NH, VF, C.v. $300, Est. $120-$150, Scott #1913/40 imp