Potosi, Bolivia, cob 8 reales, Philip IV, assayer not visible (1630s).KM-19a.26.74 grams.Bold and nearly full shield and cross, some rusty encrustation along the edges but no surface corrosion, only some hairlines from cleaning after recovery to note, patchy dark toning.From: Concepcion, sunk in 1641 off Hispaniola
($150-225)