Watch List notes:

William IV (1830-37), Proof Halfcrown, 1831, bare head right, w.w. incuse in block capitals on truncation, rev. inverted die axis, crowned shield in mantle, edge plain, 13.91g (ESC 2473 {657}; S.3834A), light peripheral tone, otherwise a pleasing extremely fine.

Estimate: £1200 - £1500