Watch List notes:

Potosi, Bolivia, cob 4 reales, 1670E. S-P37b; KM-25; CT-495. 12.48 grams. Typically darkly toned and essentially uncorroded, with full but centrally flat pillars-and-waves and cross, two dates. With NGC tag genuine / Piedmont. Recovered from: Piedmont, sunk in 1795 off Cornwall, England (Estimate: $150 - 225)