Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Germany - Catapult Flights - 1929-35, three covers, S.S. ''Bremen'', First Flight to NYC, franked by three air post stamps, addressed to Philadelphia; D.''Europa'', First Flight to NYC, franked by six stamps, addressed to Canada; the last one pre-printed cover to France with partial delivery by D. ''Europa'' (minor faults), all with appropriate confirmation markings, F/VF, Est. $500-$600