Air Mail cover 1931 (10 July) Vienna Flight card, addressed to Friedrichshafen bearing Air 50f., 72f. and 80f., with triangular framed "LUFTSCHIFF GRAF ZEPPELIN/LANDUNGSFAHRT NACH WIEN 1931" in blue, together with violet Hungarian "ZEPPELIN UTJÁN" cachet and Vienna special arrival c.d.s. Sieger 116. Photo