Zeppelin Flights. June 30-July 3, 1931, Iceland Flight postcard and cover, franked respectively by 30a and 1k, 30a and 2k stamps with ''Zeppelin 1931'' overprint, tied by Reykjavik ''30.VI.31'' ds, green confirmation cachet and Friedrichshafen ''3.7.31'' receiver hs, card has slight corner fold, still VF, Sieger #114B, D, €730, Est. $200- $250 (Image)