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SOVIET UNION
SOVIET UNION POSTAGE STAMPS AND POSTAL HISTORY
Lot # 710 | P | Scott # 328
| 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 and rare, A. Zverev certificate, Est. $800-$900 . |