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

RSFSR Issues 1918-23

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Start price: $100

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1922, registered cover from Nizhny Novgorod to Riga, postal charges paid in cash, reversal endorsement reads: ”Postage in the amount of 30,000rub collected”, backstamped, VF and scarce, Est. $200-$250