Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Brazil - Pioneer Flights - SELECTION OF 6 COVERS: 1931-37, Dornier Do X Flying Boat Europe - South America Flight of 1931, Condor - Lufthansa Flights to Germany (3) and Netherlands, Zeppelin Flight postcard of 1937, all appropriate markings, generally nice condition, F/VF, Est. $200-$300