Mexico City, Mexico, cob 8 reales, Philip IV, assayer P, with canvas impression on obverse. S-M19; KM-45; Cal-Type 319. 25.45 grams. Typical but interesting "wristwatch" shape, also typically weakly struck all over, mostly toned and corrosion-free, the whole obverse surface with checkered pattern from the remains of a canvas bag. With Sedwick photo-certificate. From: Concepcion, sunk in 1641 off Hispaniola
($200-300)