1932 2nd return flight to Berlin, sent via Rio de Janeiro where stamps from Brazil were added to pay for further transmission to Europe, v.f. and scarce mixed franking cover, with Friedrichshafen arrival - Cat. Val.
1931 Iceland Flight cover addressed to the United States, franked with 7x30a (horizontal strip of five and a pair) and 10a air post, various transit and arrival postmarks on reverse, fine cover, remarkable franking - Cat. Val.
1930 Pan-America Flight card, Mexico to New York where 65c Zeppelin was added for further transmission to Germany, v.f., with appropriate markings, autographed by Dr. Eckener. Only 10 cards prepared, very few exist - Cat. Val.
1931 Polar Flight cover franked with 4m (cancelled on board), transferred to Icebreaker Malyguin, with Moscow arrival postmark (rare), v.f. (Mi.458) - Cat. Val. €1,100
