Air Mail cover 1931 (28 March) Zeppelin Hungary Flight cover bearing 1930 South America Flight 2m. cancelled at Friedrichshafen, with German and Hungarian cachets, showing three Budapest c.d.s. (29.3)

细节
Air Mail cover 1931 (28 March) Zeppelin Hungary Flight cover bearing 1930 South America Flight 2m. cancelled at Friedrichshafen, with German and Hungarian cachets, showing three Budapest c.d.s. (29.3)