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: $300

Buyer's premium:

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, centered to the top, perfect condition, full OG, NH, fine, C.v. $900, Scott #C23a