Potosi, Bolivia, cob 8 reales, Philip III, assayer Q, Grade 1. S-P17; KM-10; Cal-916. 25.66 grams. Superb full shield (uncorroded) with bold P-Q to left, also good full cross with only very light surface corrosion, silvery in color all over. With original Fisher tag and certificate 86A-190989, pedigreed to the J.P. Silberman Estate.Recovered from: Atocha, sunk in 1622 west of Key West, Florida.