Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer R (curved leg), Grade 1. S-P15; KM-9 ;CT-244. 8.94 grams. Good full shield and cross enhanced by contrasting toning, clear assayer, light corrosion around edge and on cross. With Fisher certificate #158699. Recovered from: Santa Margarita, sunk in 1622 west of Key West, Florida

Estimate: $350 - 500