Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Germany - Zeppelin Flight - 1930 (May 19- June 6), South America Round Flight cover, franked by three stamps of 4m ''1 SUDAMERIKA FAHRT'', cancelled by Friedrichshafen ''18.5.30'' ds, German and American (type I) flight markings, and Friedrichshafen ''6.VI.1930'' receiver, VF, Scott C.v. $900 as three used stamps off cover, Sieger #57P, C.v. €600 without a premium for franking, Est. $400-$450, Scott #C39 x3