Austria, Airmail Covers, 1929-38. 4 covers and 4 cards; covers including 1929 S.S. Leviathan "Pick-up at Sea" multiple franking & U.S. combination franking, 1935, 10s airmail single franking usage, 1935 30g + 1s airmails on cover to Ceylon and a 1929 Zeppelin cover with German 2m Zepp + Austria mixed franking, cards with 3 Zeppelin flight usages and a Sudan mixed franking to Capetown S.A. Estimate  $400 - 600. $0 (Image)