Mexico City, Mexico, 4 reales, Charles-Joanna, "Late Series," assayer A to right, mintmark M to left (M-A), encapsulated NGC XF 45. Nesmith-58 type; CT-79; S-M6. 13.4 grams. Choice full details on full flan with nice toning, very light surface corrosion in spots near edge. From the "Golden Fleece" wreck (ca. 1550). (Estimate: $400 - 600)