History of Aviation, Rare Stamps and Postal History of the World, Part 2
Lot 923:
1931, Hungary Return Flight postcard (March 29-30), franked by three stamps, including horizontal pair of Zeppelin overprint on 1p orange, and Austria Flight postcard (July 12-13), franked by three air post values, appropriate confirmation markings, mostly VF, Sieger #103a, 107, €300, Est. $150-$200, Sc. #C18-20, C24
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