History of Aviation, Rare Stamps and Postal History of the World, Part 2
Lot 661:
1930 (May 28-June 6), First Pan America Return Flight cover, posted at Recife to Friedrichshafen, addressed to Czechoslovakia, franked by four stamps with blue Zeppelin overprints, American confirmation marking, Friedrichshafen drop and Prague arrival ds on reverse, mostly VF, Est. $150-$200, Sc. #C21-22
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