British, Irish and Scottish Coins

William IV (1830-1837), Proof Half-Sovereign, 1831, small flan, edge plain, 3.81g/6h (WR 267; S 3830). Marks in obverse field and on rim, hairline scratch on neck, otherwise good extremely fine
£900-1,200

There seems no apparent reason why this coin should weigh almost 0.2g light