Potosi, Bolivia, cob 8 reales, Philip III, assayer Q, Grade 1. S-P17; KM-10; Cal-916. 23.68 grams. Choice full shield and cross, also full denomination o-VIII above kings ordinal III, light surface corrosion only, toned in crevices. With original Fisher tag and certificate 86A-191810, pedigreed to the J.P. Silberman Estate.Recovered from: Atocha, sunk in 1622 west of Key West, Florida.