Russia
Nicholas II Proof 50 Kopecks 1899-ЭБ PR63 NGC, St. Petersburg mint, KM-Y58.2, Bit-76. Fully captivating with only 4 examples of this date-assayer combination appearing in the NGC census, perfect satin frosting atop the devices and creating a mildly cameo contrast against the fields.
https://coins.ha.com/itm/russia/russia-nicholas-ii-proof-50-kopecks-1899-and-1069-and-1041-pr63-ngc-/a/3076-32160.s?type=CoinArchives3076
HID02906262019
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Estimate: 3000-5000 USD