Watch List notes:

William IV (1830-37), Proof Halfcrown, 1831, bare head right, block ww incuse on truncation, rev. en médaille, crowned shield in mantle, edge plain (ESC 2473 {657}; S.3834), cabinet friction to high points, otherwise attractively toned over brilliant surfaces, a pleasing extremely fine.
provenance
Gray collection
Spink Numismatic Circular, November 1997, no. 5662 (illus.)
Estimate: £1200 - £1500