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

Soviet Union Stamps of 1924-40

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Start price: $100

Buyer's premium:

1932, Maxim Gorky 15k brown, imperforated single and Airship on the Red Square 20k pale red, used on registered cover from Leningrad to Belgium, boxed arrival marking, VF, Est. $150-$200 , Sc. #470a