Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer not visible, quadrants of cross transposed, Grade 3. KM-9. 11.37 grams. Silvery and solid despite light surface corrosion, full and well-detailed shield, full but off-center cross, edge-crack. With Fisher tag and photo-certificate #96A-14168. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $300-450