1930 South America Flight, 2m and 4m used on separate covers, one canceled on board and sent to Czechoslovakia, the other to Rio de Janeiro, fine-v.f., cat. $850 (Cat No. C38-39) (Image)

Cat. $850, Est.$500

1930 Polar Flight set of three, used on card and two covers to the Icebreaker Malyguin, couple of minor toned specks away from the stamps, fine-v.f., with arrival markings and appropriate cachets, cat. $1425 (Cat No. C40-42) (Image)

Cat. $1425, Est.$300

1935-40 four legal size covers, three from Brazil to Airship Graf Zeppelin in Friedrichshafen, corner cachet "Sindicato Condor Ltda," the other from "Deutsche Zeppelin-Reederei G.m.b.H.", window envelope franked with 12pf, with Frankfurt pmk, some cover wear, otherwise fine (Image)

Est.$250