Potosi, Bolivia, cob 1 real, 1661E.S-P37a; KM-13; Cal-763.2.55 grams.Full pillars with clear date and assayer and denomination, also nice full cross with second date below, mintmark to left and assayer to right, some surface corrosion and with deep edge-crack but nicely toned all over.With ROBCAR photo-certificate #M20182.Recovered from: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador
Estimate: 60-90 USD