Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Danzig - Zeppelin Flights - 1932 (July 30-31), LUPOSTA Flight postcard, franked by complete Exhibition surcharged set of five, tied by Danzig special ds, green confirmation cachet, Rönne ''31.7.32'' drop ds, VF, Sieger #170Aa, not priced for a complete set, Scott C.v. $300, Scott #C31-35