Great Britain
William IV Proof 1/2 Crown 1831 PR62 PCGS, KM714.1, S-3834A. Plain edge, block WW on truncation. Pastel-toned in overlapping shades of olive, sea-green, and soft crimson and gold, William's portrait gently frosted underneath this cabinet patina and very nearly lacking in any signs of handling.
https://coins.ha.com/itm/great-britain/great-britain-william-iv-proof-1-2-crown-1831-pr62-pcgs-/a/3089-32787.s?type=CoinArchives3089
HID02906262019
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Estimate: 1500-2500 USD