S23660

South America Flight 1931 - postcard with high valuable Switzerland airmail stamps mixed franking, cancelled Romanshorn 15.X.31 sent via Friedrichshafen and carried by airship on it' s third South America Flight to and also from South America by airship, therefore with additional brazilian postage, perfect quality, Sieger 133 CH/BRA, Michel Zeppelin specialized catalogue 229 a CH/BRA