Air Mail cover 1929-32 covers (4) and cards (9) carried on various Zeppelin flights comprising 1929 Orient (2, one to Palestine), America (2) and Round the World, 1930 1st and 2nd South America, and Polar (bearing Polar 2m.--defective), and 1932 1st, 2nd, 3rd and 4th South America, and Danzig, variously franked and all showing special cachets