GREAT BRITAIN. Dollar, ND (1804). George III (1760-1820). NGC AU-50.S-3766; KM-656. Octagonal Bank of England countermark on a Mexico City 1798-MoFM 8 Reales. Both countermark and host are nicely detailed with pleasant gray brown centers and peripheries that hold light multicolored iridescence. While blending well into the overall appearance, a small area of corrosion is noted along the edge just to the right of the date with very faint interior scratches from attempted softening. Countermark AU standard, host coin.NGC AU-50.