Mexico City, Mexico, cob 4 reales, Philip IV, assayer P.S-M19; KM-38.13.46 grams.Crude flan with blunted points and two hammered-smooth areas in periphery (as made), most of shield and cross still visible, no corrosion whatsoever, silvery.Recovered from: Concepcion, sunk in 1641 off Hispaniola
Estimate: 100-150 USD