Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - RSFSR and Soviet Union - 1931, Airship over the Kremlin, 20k deep carmine, top margin imperforate single with vertical position of watermark Borders and Rosettes, full OG, LH, VF and scarce watermark variety, Est. $300-$400, Scott #C17 var