Watch List notes:

Potosi, Bolivia, cob 1 real, 1656E. S-P37a; KM-13; CT-1056. 2.48 grams. Broad flan with nearly full pillars and cross, three dates (including a full 4-digit date in legend, minimal corrosion, darkly toned all over. Recovered from: Consolacion, sunk in 1681 off Isla Santa Clara, Ecuador

Estimate: $150