George III (1760-1820), Pre-1816 issues, Proof Penny, 1806 (early Soho), in gilt-copper, edge centre-grained, 18.88g/12h (BMC 1321 [KP 29]; Selig 1299; S 3780). Minor surface and rim marks, otherwise extremely fine and retaining much brilliance; in original metal shells £400-600