Mi.529-539 (21.01.1934)
Airmail Golden Eagle

Registered cover sent by airmail from Ravensburg to Texas, featuring postage stamps Mi.529 (5 Pf), Mi.530 (10 Pf), Mi.531 (15 Pf), and Mi.533 (25 Pf). Ref: 18.12.1937

Stamps first issued 21st January 1934 for the air mail service. Mi.529-537 depicting a soaring Golden Eagle whilst Mi.538 (2 M) depicts aviation pioneer Otto Lilienthal and Mi.539 (3 M) depicts Ferdinand von Zeppelin.