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

Soviet Union - Die Proofs Selection

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Start price: $250

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1981, International Communications Exhibition ”Svyaz 81”, sunken die stage proof of engraved part of the design of 4k in red brown, size 120x100mm, printer’s markings at sides, printed on stamp gummed paper, traces of hinges, VF and very rare, Est. $400-$500, Scott #4978