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, lower case ''f'' variety, surcharge position 7 of 25-stamp setting, full OG, LH, VF, Soviet Philatelic Association guarantee hs, C.v. $1,500, Est. $1,000-$1,200`, Scott #C68b