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

Soviet Union 1923-40

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Start price: $500

Buyer's premium:

1931-32, 3rd definitive issue, 1k-1r, imperforate set in pairs or strips of three (no 10k value), full OG, NH (one stamp of 30k strip is LH), VF and scarce, C.v. $1,345++, Scott #456/67