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

Soviet Union of 1923-40

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Start price: $1,000

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1932, Postage stamps competition ”5-Year Plan in 4 Years”, group of 13 not approved black-and-white photo essays, including 11 imperforate and 2 perforated stamp size items, 4 mounted on one piece, apparently three different artists, mostly VF and extremely rare, Est. $2,000-$2,500