GREAT BRITAIN. Great Britain - Mexico. Dollar, ND (1797-99). George III. PCGS EF-45 Gold Shield; Countermark: AU Details. S-3765a; KM-634. Bank of England type I countermark: bust of George III within oval indent on a 1791-Mo FM Mexico 8 Reales of Charles IV (KM-109). Gunmetal gray and with an alluring olive tone, this handsome specimen serves as a great host coin for an ever-popular countermark, and even offers hints of brilliance remaining in the protected areas.