Auction 90, Session 2 - Worldwide Rare Stamps and Postal History
Lot 1342:
1929-30, Zürich-Dübendorf Flight (Nov.2, 1929) postcard, franked by three air post stamps, and Geneva Flight (Sept. 14, 1930) stationery postcard 10(c) green uprated by air post stamp of 2fr, both with all appropriate markings, fresh and VF, Sieger #46, 87, Est. $140-$180, Sc. #C3, C6, C13, C15
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