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

Soviet Union - Large Die Proof

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Start price: $250

Buyer's premium:

1980, Mordovian Autonomous Republic, die proof of 4k in carmine (issued color), artist Y. Kosorukov, size 89x120mm, printer’s markings at sides, produced on wove paper, no gum as issued, NH, VF and very rare, Est. $500-$600, Scott #4806