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

Soviet Union of 1923-40

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Start price: $150

Buyer's premium:

1927, definitive issue, double (one albino – shifted to the top for 2mm) black surcharge 8k on worker 7k brown, perforation 14½x15 on paper without watermark, full OG, previously hinged, VF and rare, this error is not mentioned in Specialized catalogs, Raritan Stamps guarantee, Est. $300-$400, Scott #349 var