Zeppelin, South America etc 1930s 22 Zeppelin covers incl S Brazil May 30, 1 each with 5k & 10k Zeppelin stamps, ovpt Zeppelin & 10k ovpt on Zeppelin stamps (stamps cat US$950 6g Frost). Also Brazil Aug 1931-May 1934 (7); Argentina June 1930; Spain-Brazil 1930 (2); Russia to Freidrichshafen 1930; Russia, North Pole 1931 (2); Netherlands internal 1932 & Hungary-Brazil 1935 (2 scarce). (Image)