Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Danzig - Zeppelin Flight - 1931 (July 24-27), North Pole Flight cover delivered on leg Friedrichshafen - Berlin - Leningrad - Ice-Breaker ''Malygin'', addressed to Switzerland, franked by two stamps, tied by Danzig ''22.7.31'' oval ds, Friedrichshafen connection and red flight markings, Ice-Breaker ''Malygin'' ''27.VII.31'' drop and Basel receiver, mostly VF and scarce, Sieger #119, C.v. €900, Est. $500-$600, Scott #197, C30