1930 $1.30 and $2.60 Zeppelin, used on May 7, 1930 "Europe Pan-America Round Flight" cover to Bremen, with corresponding cachets, including South America in red, also "This Article Made The Complete Round Flight via Graf Zeppelin", Friedrichshafen (6.6.30) pmk on back, tiny corner perf. stain at upper right, otherwise fine and attractive cover (Cat No. C14,15) (Image)

Est.$300

1936 50c green, tied by May 9, 1935 Third International Philatelic Exhibition cancel on cacheted L.Z. 129 Hindenburg cover, flown on the airship to Germany, with Frankfurt arrival pmk on back, faint overall toning, fine and unusual example of 50c Century of Progress stamp used on a Hindenburg flight (Cat No. C18) (Image)

Est.$100