George III (1760-1820), Pre-1816 issues, Restrike Proof Penny, 1807, bronzed, edge plain, 18.90g/6h (BMC 1354 [R 98]; Selig 1312; S 3780). Brilliant and virtually as struck, rare £500-600

Provenance: With envelope inscribed ‘ex Boulton descendants’; bt Spink