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

Lot 710:

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Soviet Union - Stamps and Postal History

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Start price: $400

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Description

1925, Alexander Popov, imperforate proof of 7k in red orange, horizontal pair printed on thick paper with security text on reverse, no gum as produced, NH, VF, A. Zverev certificate, Est. $800-$900 , Scott #328