Russia
USSR Proof 20 Kopecks 1924 PR64 NGC, KM-Y88. Bearing just mildest hint of a cameo contrast, with only the slightest wisps keeping it shy of a gem Proof grade.
https://coins.ha.com/itm/russia/russia-ussr-proof-20-kopecks-1924-pr64-ngc-/a/3082-34747.s?type=CoinArchives3082
HID02906262019
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Estimate: 800-1200 USD