Potosi, Bolivia, cob 4 reales, 1679V.S-P39; KM-25; Cal-524.7.64 grams.Thin edges from corrosion with weak but visible pillars and cross details including parts of all three dates, dark gray tone.With ROBCAR tag and photo-certificate #2020006.From: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador
($125-200)