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

Volga German Autonomous Soviet Republic

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Start price: $100

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1939, incoming cover from Gorky to Engels, franked by farm worker 20k green, postage due Sormovo marking placed by mistake, bilingual arrival date stamp reads ”KIOSK NR.5 ASSRNP. 25.2.39”, mostly VF and the only recorded type of receiver device, Est. $150-$200, Sc. # 617