George III (1760-1820), Pre-1816 issues, Proof Twopence, 1797 (late Soho), in bronzed-copper, edge plain, 5mm flan thickness, 56.48g/6h (BMC 1075 [KT 3]; Selig 1265; S 3776). Graze in upper reverse field, otherwise virtually as struck, very rare £700-900