Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - GROUP OF AIR POST ISSUES: 1927-38, Hague Air Post Conference, Stratostat USSR 1, Usyskin 5k perforation 14, Airplanes of 1937 and North Pole Flight of 1938, the total is 17 stamps of five issues, all with will OG, except Usyskin stamp, which is expertly regummed, NH, mostly VF, C.v. is over $900, Est. $400-$500, Scott #C10/C75, 625-28