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: $100

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1931, Airship over the Arctic Region, 50k dark gray blue, color error, perforation 10½x12, unused, expertly regummed, fresh condition with no hidden defects, VF appearance, Scott #C23a