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

Soviet Union

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Start price: $200

Buyer's premium:

1924-25, definitive issue, worker 20k green, typo printing on grayish paper without watermark, side margin horizontal imperforated strip of 5, two invalidating perforation, full OG, NH, F/VF, Est. $300-$400, Sc. # 288 imp