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

Soviet Union 1923-91

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Start price: $200

Buyer's premium:

1980, Soviet Flag, die proof of 3k in bright red (issued color), artist A. Kalashnikov, size 88x119mm, control markings at sides, official handstamp at right, printed on wove paper without gum, VF, Est. $400-$500, Scott #4887