Russia
R.S.F.S.R. Proof 15 Kopecks 1921 PR65 NGC, KM-Y81. Exceedingly handsome and very nearly pressing the upper bounds of its gem Proof grade, a lovely champagne color revealed in the fields under good light.
https://coins.ha.com/itm/russia/russia-rsfsr-proof-15-kopecks-1921-pr65-ngc-/a/3082-34743.s?type=CoinArchives3082
HID02906262019
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Estimate: 1400-1600 USD