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 Levanevsky stamp of 10k dark brown, surcharge position 24 of 25-stamp setting, full OG, LH, VF, Soviet Philatelic Association guarantee on reverse, C.v. $500 , Scott #C68