MEXICO. 8 Reales, 1755-Mo MM. Mexico City Mint. Ferdinand VI (1746-1759). PCGS Genuine--Harshly Cleaned, VF Details. KM-104.2; Cal-Type 63 #489. This 8 Reales has begun to re-tone from its evident cleaning, now starting to darken in the fields. The surfaces show very few marks considering the level of circulation and wear, rendering this piece an attractive example of the type.