Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2

Soviet Union

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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 on reverse, mostly VF, Est. $150-$200, Scott #470a