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: $300

Buyer's premium:

1937, Alexander Pushkin, 40k rose lake, perforation L13¾, top left corner sheet margin unfolded block of four, full OG, NH, VF, C.v. $660 as singles, Est. $500-$600 , Sc. #592D