Russia
USSR Proof 20 Kopecks 1925 PR66 Cameo NGC, KM-Y88. Icy white, fully mirrored with a slight gold tinge to the planchet.
https://coins.ha.com/itm/russia/russia-ussr-proof-20-kopecks-1925-pr66-cameo-ngc-/a/3082-34748.s?type=CoinArchives3082
HID02906262019
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Estimate: 1200-1500 USD