Watch List notes:

Potosi, Bolivia, cob 4 reales, 1668E. S-P37b; KM-25; CT-493. 13.63 grams. Full pillars-and-waves with bold date, nearly full cross with second date below, darkly toned, minimal corrosion but a few spots of orange encrustation on edge. Unidentified ca.-1671 wreck in Seville Harbor, Spain

Estimate: $200-300