Potosi, Bolivia, cob 8 reales, Philip III, assayer M, quadrants of cross transposed, Grade 1. KM-10. 26.73 grams. Solid and uncorroded, with bold P•M next to full shield, full cross, some flat spots, toning in crevices. With Fisher photo-certificate #80M-8376, and pedigreed to our Auction #17, with original lot-tag #362. Recovered from: Santa Margarita, sunk in 1622 west of Key West, Florida ($400-600)