Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip II, assayer B (3rd period), Grade 1. S-P10; KM-4.2. 13.60 grams. Roundish flan with nice full shield and cross, full P-B and denomination, some weak spots but no corrosion. With Fisher certificate #191248. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $500 - 750