Russia
R.S.F.S.R. Proof 50 Kopecks 1921-AГ PR66 NGC, Leningrad mint, KM-Y83. Obv. National arms. Rev. Star in circle of beads with "50" in center and date below. All in wreath, with "50 KOPECKS" above. An appealing issue, with a touch of overall golden patina and hues of gray and russet around the peripheries. Only one piece has been certified finer by NGC.
https://coins.ha.com/itm/russia/russia-rsfsr-proof-50-kopecks-1921-aand-1043-pr66-ngc-/a/3076-32174.s?type=CoinArchives3076
HID02906262019
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Estimate: 1500-2000 USD