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

RSFSR Issues 1918-23

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Start price: $75

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1921-22, six stamps with full mirrored offset of the design on gum side, including four singles and two pairs, 1000r on ordinary, chalk-surfaced and thin paper (pair with strongly shifted offset), all with full OG, NH, VF, Est. $100-$150, Scott #182/86, 210 var