Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Germany - Zeppelin Flight - 1929 (October 2), 4th Switzerland Flight pre-printed postcard (view of Hamburg), franked by two Eagle Air Post values, ''2.10.1929'' on-board cancellation, Bern the same day arrival marking, VF, Sieger #39c, €330, Scott #C29-30