Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3

RSFSR Issues 1918-23

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Start price: $150

Buyer's premium:

1922, registered cover (Dr. Brender’s correspondence) from Zvenigorodka (Kyiv Gub.) via Moscow, to Berlin, eight surcharges of 7500r/250r violet printed on chalk-surfaced paper applied upon arrival to Moscow, black roller cancel “Po Doverennosti” (By Proxy) and two Moscow ds, minor wearing, still F/VF and rare cancellation, Est. $250-$300, Scott #201b