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

Soviet Union

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Start price: $300

Buyer's premium:

1925, definitive issue, worker 8k olive brown, litho printing, ”small head” variety, sheet margin perforated horizontal pair and imperforated vertical pair, both with invalidating perforation across the design, full OG, NH, VF, Est. $500-$600, Scott #311 var