1930 BOLIVIA-First Europe Pan America Flight(14 MAYO 30) bearing Air ovpt set and 'Z' Zeppelin ovpt set, SG 228-35, 241-3 cat £525, postmarked La Paz, with Primer Correo Aereo cachet and violet diamond Zeppelin cachet, Friedrichshafen backstamp, Sieger cat E1800, fine and rare [US3] (Start Price = £286.40) (Image)

1933 GERMANY-Cover to Poto Alegra, Brazil with Air 50pf orange and Zeppelin Chicago Flight 1RM red tied oval Frankfurt-Basel Bahnpost Z 297 12.10.33 cancel, red triangular OZEANUBERQUERUNG cachet, Porto Alegreir backstamp, attractive and fine, stamp cat £600 [US3] (Start Price = £142.40) (Image)