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

Worldwide Air Post Stamps and Postal History - Danzig - Zeppelin Flight

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Start price: $75

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1931 (June 28), Schwaben Flight postcard, franked by two stamps, tied by oval date stamp, Friedrichshafen ”28.6.31” connection and Böblingen the same day arrival marking, violet confirmation cachet, VF, Sieger #112, Scott #C29