Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - 1933-37, Balloons of 1933, Civil Aviation watermarked issue, the Stratosphere Disaster of 1934 and Aviation Exhibition of 1937, the total is 18 values, full/large part of OG, NH (Balloon 20k and Airplanes of 1937) or LH/hinged, mostly VF, C.v. $1,147, Scott #C37/75