Watch List notes:

Crown 1831 WW incuse on truncation Plain edge Proof, ESC 271, Bull 2462, die axis inverted, 27.34 grammes, nFDC with rich original gold and blue/green tone, a very rare and desirable type forming part of the Proof set of the year. All William IV Crowns are highly prized and this type is missing from many advanced Crown collections

Estimate: 12000-20000 GBP