MEXICO. 1/4 Real, 1800-Mo. Mexico City Mint. Charles IV. NGC EF-45. KM-62; Cal-128. A highly attractive example for the grade, this silver fractional piece shows only a touch of wear on its high points. Its surfaces are deeply toned to a rustic charcoal gray, though subtle iridescent color shines through on the lustrous fields surrounding the castle. Ex: Gamboa Collection.