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

Soviet Union

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Start price: $400

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Description

1966, Wilhelm Pieck, two die proofs of 6k in indigo or dark violet, artist S. Pomansky, engraver A.Tkachenko, sizes 30-31×41-43mm, perfect quality, no gum as produced, VF and rare, Est. $800-$1,000 , Scott #3197