Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Luxembourg - Zeppelin Flight - 1932 (July 30-31), LUPOSTA (Danzig) Flight registered cover to Switzerland, franked by four air post values, on time of connection uprated by five German adhesives, tied by Friedrichshafen ''30.7.32'' ds, blue confirmation cachet, Danzig drop (31.7) and Samaden ''2.VIII.32'' receiver on reverse, mostly VF, Sieger #169, C.v. €450, Est. $300-$350, Scott #C2-5