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

RSFSR Issues 1918-23

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Start price: $100

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FOR MAILMAN: 1918, 10k black on colored paper, set of four values, the text reads: ”According to the agreement between the sender and the recipient, the postman who delivered this letter is paid by the recipient 10 kop”, no gum as issued, VF, Est. $150-$200