Potosi, Bolivia, cob 4 reales, Philip III, assayer T, Grade 2. S-P21; KM-9. 8.23 grams. Small, thick flan with much of edge lost to corrosion, nearly full shield and cross anyway, silvery from cleaning. With Fisher photo-certificate #80M-5129. Recovered from: Santa Margarita, sunk in 1622 west of Key West, Florida ($300-450)