George III (1760-1820), oval countermark upon Spanish Four Reales of King Charles IIII (1788-1808), 1791 MF, struck in Madrid, Spain, octagonal bust of George III from the maundy Penny die punch right at centre of obverse, bust of Spanish King laureate and draped right, date below with stop either side, legend and toothed border surrounding, CAROLVS IIII. DEI. G., rev. crowned quartered shield of arms, R to left for Reales over mint mark crowned M for Madrid, 4 to right over Mint Assayer initials MF., legend and toothed border surrounding, HISPANIARUM. REX., weight 13.63g (Bull 1875; ESC 611; S.3767). Toned, host coin almost extremely fine, countermark extremely fine, a pleasing example.