Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1930 (September 10-11), Zeppelin Moscow Return Flight stationery card and cover, franked by Zeppelin stamps of 40k and 80k respectively along with other stamps, tied by special Zeppelin ''10.IX.30'' ds, two-line violet confirmation marking, each one with Friedrichshafen ''11.9.30'' receiver, mostly VF, Sieger #85Aa, Bb, Scott #C12-13