Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer T, Grade 1. S-P21; KM-9. 12.88 grams. Full but lightly corroded shield and cross, the former with dark patch of toning, bold assayer to left. With Fisher photo-certificate #8856 (replacement copy). Recovered from: Santa Margarita, sunk in 1622 west of Key West, Florida

Estimate: $350 - 500