Accession of William IV 1830 67mm diameter in copper by W.Wyon, Obverse: Bare head of William IV right GUILELMO IIII D:G: BRITANNIAR : REGI F:D:, Reverse: ADELAIDE REGIMA CUDI JUSSIT MDCCCXXX within a wreath with trident below, 139 grammes, BHM 1414, GEF with a dark tone patch on the reverse