Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia And Soviet Union - 1934, Civil Aviation, 10k green, right sheet margin horizontal pair imperforate between stamps, printed on paper without watermark, Leningrad CTO with full OG (NH), VF, C.v. $1,250, Est. $600-$700 , Scott #C46a