Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Switzerland - Zeppelin Flights - 1932 (September 12 - October 27), four postcards representing 6th, 7th, 8th and 9th SAF of the year, appropriately franked and cancelled at Romanshorn, bearing Friedrichshafen connections, confirmation markings in various colors and arrival ds, mostly VF, Sieger #177, 183, 189, 195, €490 without a premium for franking, Est. $250-$300