Great Britain
William IV bronzed copper Proof Penny 1831 PR65 Brown NGC, KM707a, S-3845, Peck-1457. No initials on truncation, coin rotation. From the William IV coronation coin set. Immensely glossy, featuring maroon-tinged brown surfaces, the lightness of color over the King's bust lending a visual quality not entirely unlike a cameo effect.
https://coins.ha.com/itm/great-britain/great-britain-william-iv-bronzed-copper-proof-penny-1831-pr65-brown-ngc-/a/3085-31642.s?type=CoinArchives3085
HID02906262019
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Estimate: 2000-2500 USD