Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - 1935, Moscow - San Francisco Flight, red surcharge 1r on S. Levanevsky 10k dark brown, surcharge position 1 of 25-stamp setting, full OG, NH, VF, Soviet Philatelic guarantee hs, Z. Mikulski certificate, C.v. $1,275, Scott #C68