Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Soviet Union Stamps of 1924-40

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Start price: $100

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1937, Alexander Pushkin, 10k orange brown, perforation 12 ¼x13¾, block of four, top right and bottom left stamps with a dot inside ”o” in ”Pochta” variety, Kiev CTO markings, NH with full OG, VF and scarce multiple even in used condition, Est. $150-$200, Sc. #590 var