Watch List notes:

Potosi, Bolivia, cob 8 reales, 1650O, early-style date, with crowned-O countermark on cross. S-P35; KM-19b; CT-509. 27.41 grams. Broad flan with minimal corrosion (at edge only), choice full shield and cross, clear date and P-O and 8-O, full countermark (scarce), lightly toned, edge-split. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0139. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($500-750)