George III (1760-1820), Pre-1816 issues, Proof Penny, 1806 (late Soho), in copper, edge centre-grained, 18.87g/12h (BMC 1327 [KP 31]; Selig 1304; S 3780). Spots on drapery and in exergue, otherwise virtually as struck with full original colour and reflective fields
£300-400

Provenance: Bt Spink 1998