George III (1760-1820), Pre-1816 issues, Proof Penny, 1806 (late Soho), in bronzed-copper, edge centre-grained, 16.69g/6h (BMC 1328 [KP 32]; Selig 1305; S 3780). Trifling specks, otherwise virtually as struck
£250-300

With NGC slab label, graded PF65 BN