Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Russian Air Post Stamps

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Start price: $750

Buyer's premium:

1935, Moscow-San Francisco Flight, red surcharge 1r on 10k dark brown, right sheet margin single from position 25 of 25-stamp setting, full OG, NH, VF and rare marginal stamp, Soviet Philatelic guarantee hs, C.v. $1,275++, Est. $1,200-$1,500 , Sc. #C68