Russia
R.S.F.S.R. Proof 10 Kopecks 1922 PR66 NGC, Leningrad mint, KM-Y80. Obv. National arms. Rev. Rayed star over date and value in beaded circle. Well struck, with fully mirrored fields. Light toning spots are noted, with a touch of golden patina. None have been certified finer.
https://coins.ha.com/itm/russia/russia-rsfsr-proof-10-kopecks-1922-pr66-ngc-/a/3076-32169.s?type=CoinArchives3076
HID02906262019
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Estimate: 1200-1500 USD