GERMANY, 1930 Pan-American Flight (Sieger 57FF). Two singles of 2m Sudamerica Zeppelin stamps (Image)

E. $ 200-300

GERMANY, 1930 Pan-American Flight (Sieger 57FF). Horizontal pair of 4m Sudamerica Zeppelin st (Image)

E. $ 300-400

GERMANY, 1930 Pan-American Flight (Sieger 57FF). 4m Sudamerica Zeppelin stamp tied by Luftsch (Image)

E. $ 200-300

GERMANY, 1930 Pan-American Flight (Sieger 57NN). Vertical pair of 4m Sudamerica Zeppelin stam (Image)

E. $ 400-500

LIECHTENSTEIN, 1930 Pan-American Flight (Sieger 57NN). Five Lichtenstein stamps, tied by Trie (Image)

E. $ 400-500

DANZIG, 1930 Pan-American Flight (Sieger 57NN). Danzig 1g and pair of 2-1/2g stamps, tied by (Image)

E. $ 300-400

SWITZERLAND, 1930 Pan-American Flight (Sieger 57NN). Switzerland 50c, block of 1fr and 5fr st (Image)

E. $ 300-400

SWITZERLAND, 1930 Pan-American Flight (Sieger 57NN). Switzerland 75c, 1fr and 3fr stamps, tie (Image)

E. $ 300-400

SWITZERLAND, 1930 Pan-American Flight (Sieger 57NN). Switzerland 75c, 1fr and 3fr stamps, tie (Image)

E. $ 300-400

GERMANY, 1930 Pan-American Flight (Sieger 57UU). Nine German stamps on 15pf postal card, tied (Image)

E. $ 300-400

SPAIN, 1930 Graf Zeppelin Flight (Sieger 58C). Spain 10p tied by Seville double-circle datest (Image)

E. $ 300-400

URUGUAY, 1930 Pan-American Flight (Sieger 61Ab). Uruguay 8c, 10c and 40c stamps, tied by Exte (Image)

E. $ 200-300

UNITED STATES, 1930 Pan-American FIight (Sieger 64C). U.S. $2.60 Zeppelin tied by New York N. (Image)

E. $ 200-300

UNITED STATES, 1930 Pan-American Flight (Sieger 64F-64G). Two covers, first with U.S. 65c Zep (Image)

E. $ 300-400

PANAMA, 1930 Pan-American Flight (Sieger 64X). Printed "Behrens-Neuheiten-Dienst" card with f (Image)

E. $ 750-1,000

SWITZERLAND, 1930, September 14, Switzerland to Cuba (Sieger 87). Six Switzerland stamps on " (Image)

E. $ 400-500

CUBA, 1932 Graf Zeppelin Flight (Sieger 172A). Cuba 50c Air Post tied by Havana May 28 machin (Image)

E. $ 1,000-1,500

UNITED STATES, 1933 Graf Zeppelin Miami-Seville Combination Flight Cover (Sieger 242C). Cuba (Image)

E. $ 750-1,000

CUBA, 1936 Trans-Atlantic by Hindenburg. Cuba 50c imperforate Air Post tied by Habana, (Image)

E. $ 750-1,000

CUBA, 1936 Trans-Atlantic by Hindenburg. Cuba 50c Air Post tied by Habana, Cuba Sep. 28, 1936 (Image)

E. $ 750-1,000

Cuba Zeppelin Flight Cover Spectacular Balance. An incredible 75 cards or covers with a mix o

E. $ 7,500-10,000