Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - Zeppelin Flights - 1932 (August 29-September 1), 5th SAF cover from Moscow to Bogota, franked by three airship stamps, Friedrichshafen connection, uprated by 3 Colombian adhesives (2 not cancelled), violet confirmation cachet, SCADTA label is alongside, Pernambuco ''1.IX.32'' drop and two arrival markings on reverse, mostly VF, Sieger #171, Est. $500-$600, Scott #C21-23