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

Russia and Soviet Union - Air Post stamps

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Start price: $50

Buyer's premium:

1932, Airship over the Dnieper Dam, two stamps of 15k gray black, perforation 10½ and 14 respectively, first one neatly cancelled, the other one with OG, both are VF, Est. $100-$120, Scott #C25a, b