Mexico City, Mexico, 4 reales, Charles-Joanna, "Late Series," assayer O to right, mintmark oM to left (oM-O). Nesmith-110b; CT-88; S-M10. 12.78 grams. Good full pillars and shield, full CAROLVS in legend, lightly toned XF with small edge-crack and odd extra metal below mintmark. (Estimate: $200 - 300)