Mexico City, Mexico, cob 8 reales, Philip IV, assayer not visible, with canvas marks on reverse. KM-45. 22.53 grams. Good full shield with bold full denomination 8, parts of king's ordinal in legend, full but corroded cross with crosshatch pattern in surface as from oxidation with original canvas bag, silvery all over. Recovered from: Concepcion, sunk in 1641 off Hispaniola
Estimate: 200 - 300 USD