Watch List notes:

William IV (1830-1837), Proof Shilling, 1831, bare head right, block W. W. on truncation, rev. crowned value in wreath, edge plain, 5.70g, 7h (Bull 2488; ESC 1266; Spink 3835), bright and slightly hairlined, but otherwise brilliant fields with a small metal flaw before chin, evidence of stain removal from reverse field, nevertheless the portrait supremely cameo with appealing 'frost', extremely fine, rare and only issued with the Coronation Proof sets.

Estimate: £300 - £400