MEXICO. 8 Reales, 1757-Mo MM. Mexico City Mint. Ferdinand VI (1746-1759). PCGS Genuine--Tooled, VF Details. KM-104.2; Calico-493. The grade notes tooling on this piece but omits the evident saltwater corrosion. The reverse details are more evident than those of the obverse. Interesting and possesses a survival story we can now only guess at.