Potosi, Bolivia, cob 8 reales, Philip III, assayer Q, Grade 1. S-P17; KM-10; Cal-916. 23.29 grams. Solid flan with bold full P-Q and denomination o-VIII flanking nice full shield (actually somewhat lustrous on this side), bold full cross with traces of toning in crevices plus dark spot of corrosion near center. With original Fisher tag and certificate 86A-191121, pedigreed to the J.P. Silberman Estate.Recovered from: Atocha, sunk in 1622 west of Key West, Florida.