Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - United States - Zeppelin Flights - 1930 (May 18-June 6), South America Round Flight postcard, franked by Zeppelin stamp of 65c green, tied by Saint Joseph, MO ''APR.21.1930'' ds, German and American confirmation cachet, Friedrichshafen ''6.6.30'' arrival marking, VF, Est. $300-$400, Scott #C13