Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1934, the Stratosphere Disaster, 5k, 10k and 20k, complete set of three used on registered cover from Moscow to USA, tied by Moscow ''21.10.34'' date stamp, appropriately cancelled exchange tax stamp 5k/70k is on reverse, NYC ''11.1.1934'' transit and Columbus, OH ''Nov.2.1934'' arrival markings, minor wear on reverse and somewhat discoloration on front, still F/VF and rare franking by complete set, Est. $500-$600, Scott #C50-52