Watch List notes:

Potosi, Bolivia, cob 1 real, 1677E. S-P37b; KM-23; CT-713. 1.65 grams. Bold full pillars-and-waves and most of cross but thin from corrosion, nicely toned. With ROBCAR photo-certificate #M003125. Recovered from: Consolacion, sunk in 1681 off Isla Santa Clara, Ecuador

Estimate: $150