Mexico
Ferdinand VI Real 1759/8 XF Details (Surface Hairlines) NGC, Mexico City mint, KM76.2 (different crowns on the pillar side). Probably a land-burial piece with slightly porous surfaces and improper cleaning evidence. A tad scarcer overdate, only two specimens of which are currently included in NGC's census, none of which are in Mint State.
Estimate: 80-100 USD