Mexico City, Mexico, cob 8 reales, Philip IV, assayer not visible. KM-45. 25.13 grams. Broad flan (unevenly thick) with nearly full shield and cross despite light to moderate corrosion, much peripheral flatness but partial king's name in legend. Recovered from: Concepcion, sunk in 1641 off Hispaniola
Estimate: 200 - 300 USD