Watch List notes:

Mexico City, Mexico, 4 reales, Charles-Joanna, "Late Series," assayer O to right, mintmark oM to left (oM-O).Nesmith-110b; Cal-138; S-M10; KM-18.13.31 grams.Pretty XF example with lots of contrast between bright highlights and dark crevices, some doubling but most of legend visible, a decent coin from this assayer, the last of the "Late Series" coinage.
($300-450)