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

Soviet Union - Large Die Proofs

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Start price: $1,500

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1980, Research Fleet, 2k-15k, complete set of six sunken die proofs in black, artist A. Axamit with group of engravers, size 118-120×98-100mm, each one with printer’s markings at sides, printed on stamp gummed paper, 15k with tiny marginal thin, all with traces of hinges, mostly VF and very rare in complete set, Est. $2,000-$3,000, Scott #4881-86