Worldwide Air Post Stamps and Postal History, One Man Collection of Tannu Tuva, Philatelic Rarities of the World, Part 2

Soviet Union

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Start price: $1,600

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Description

1938, Papanin’s Expedition, 50k blue, bottom sheet margin horizontal imperforate pair, full original gum with a few tiny black dots from an old mount, NH (LH on margin), VF and very rare multiple, C.v. $8,500 as two singles, Est. $3,000-$4,000 , Scott #646a