Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer T, quadrants of cross transposed, Grade 2. S-P21; KM-9. 11.86 grams. Good full shield and cross, the former with light to moderate surface corrosion, nice toning all over. With Fisher photo-certificate #2274. Recovered from: Santa Margarita, sunk in 1622 west of Key West, Florida

Estimate: $300 - 450