Zeppelin Flights. 1931 (April 10-13), Egypt Return Flight cover, franked by both Zeppelin surcharges, including error ''1951'' 50m/27m, tied by Cairo ''10.AP.31'' ds, Friedrichshafen ''13.4.31'' arrival marking on reverse, VF, Sieger #105Axa, Ay, C.v. €350 (Image)

Zeppelin Flights. 1931 (April 11-13), Egypt Return Flight postcard (Graf von Zeppelin) to Germany, franked by three non-Zeppelin stamps, cancelled Cairo ''11.AP.31'' ds, straight line violet confirmation marking and Friedrichshafen ''13.4.31'' arrival hs, VF, Mi #166A III, €500 (Image)