Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 63:
1929 (November 2-3), Dübendorf and Böblingen Flights postcard to Lausanne, franked by three values, cancelled on-board, bearing two red confirmation markings of 2. NOV.1929 and 3.NOV.1929, boxed ”Mit Luftpost…” and Böblingen drop ”3.11.29. 13-14”, arrival ds is on reverse, mostly VF and rare, Sieger #45e, €800, Est. $300-$350, Scott #379, C27 x2
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