George III (1760-1820), Pre-1816 issues, Proof Penny, 1806 (late Soho), in copper, 9 brooch jewels, imperfect date numerals, edge grained, 18.81g/12h (BMC 1327 [KP 31]; Selig 1304; Adams 56, this coin; S 3780). Spot by first n of britannia, otherwise virtually as struck
£250-300

Provenance: SNC February 1995 (293); C. Adams Collection, Spink Auction 164, 23 July 2003, lot 56