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

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1982, Equestrian Sports, 6k multicolored, water-color essay, size 125x90mm, signed by the artist N. Litvinov at the bottom, VF and unique, stamp of the same but mirrored design was issued with denomination 15k, Est. $400-$500, Scott #5017