Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Worldwide Air Post Stamps and Postal History - Soviet Union

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Start price: $150

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1932, International Polar Year, 50k carmine and 1r green, complete set of two, perforation 12 and 1r with perforation 10½, all have perfect centering, full OG, NH, VF, C.v. $390, Scott #C34-35, C35a