Russia
Nicholas I copper Proof Pattern 3 Kopecks 1840-CПБ PR63 Brown NGC, KM-Pn106, Bit-929 (R2), Brekke-206. A deeply-engraved and flawlessly executed copper Pattern overlaid with deep walnut and espresso patination dappled with moments of seafoam and aqua laid upon the surfaces where hardly a mark of consequence is discernible even under magnification.
https://coins.ha.com/itm/russia/russia-nicholas-i-copper-proof-pattern-3-kopecks-1840-cand-1055-and-1041-pr63-brown-ngc-/a/3106-34196.s?type=DA-DMC-CoinArchives-WorldCoins-3106-01172023
HID02906262019
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