George III (1760-1820), Soho coinage, mule Proof Farthing, 1806, in bronzed-copper, small obv. letters, large rev. letters, stop after hibernia, edge plain, 4.71g/6h (S 6622; DF 604; same dies as Baldwin NY XVII, 818 obv./819 rev.). Graze by h of hibernia, otherwise extremely fine and very rare (£150-250)