Watch List notes:

MEXICO, Mexico City, 4 reales, Charles-Joanna, "Early Series," assayer Latin R (Rincón) at bottom between pillars, motto as LVSV in rounded panel, rare. Nesmith-6c; S-M1; Cal-115; KM-16. 11.63 grams. Silvery and lightly corroded (especially on edge) but with bold details all over, shield-side legend somewhat double-struck. Recovered from: "Golden Fleece wreck," sunk ca. 1550 in the northern Caribbean

Estimate: 2000 - 3000 USD