Potosi, Bolivia, cob 8 reales, 1651O, with crowned-L countermark on cross. S-P35; KM-19b; CT-510. 26.00 grams. Choice full countermark and crown, the shield and cross technically full but cruder, full P-O and 8-O, bold date, minimal corrosion, edge-crack. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0155. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($400-600)