George III (1760-1820), Pre-1816 issues, Proof Farthing, 1799 (late Soho), in bronzed-copper, edge obliquely grained, 6.25g/6h (Cooke 300; BMC 1277 [KF 10]; Selig 1430; S 3779). Surface marks and fields somewhat clouded, otherwise extremely fine £100-£120