Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Liechtenstein - Zeppelin Flights - 1931 (June 10), Vaduz and Lausanne Flight postcard and cover, franked by Zeppelin stamps of 1fr and 2fr respectively, all appropriate postal markings, the card in addition has oval official seal in black, VF, Sieger #110A, B, C.v. €600, Est. $250-$300, Scott #C7-8