Watch List notes:

Mexico City, Mexico, 4 reales, Charles-Joanna, "Late Series," assayer R to left, mintmark M to right. Nesmith-74; CT-90; S-M7. 12.30 grams. Broad flan with small piece lost to corrosion, otherwise almost full legends and inner details, darkly toned all over (unconserved). Recovered from: "Golden Fleece wreck," sunk ca. 1550 in the northern Caribbean
($250-375)