Potosi, Bolivia, cob 4 reales, 1678E.S-P37b; KM-25; Cal-522.9.40 grams.Darkly colored and corroded with some horn silver, weak cross side but clear date and assayer on the pillars side.With ROBCAR tag and photo-certificate #2020019.From: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador
($125-200)