Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651E/O, with crowned-•F• (four dots) countermark on shield. S-P36; KM-19b; CT-512. 24.56 grams. Nice specimen with very bold full countermark, clear over-assayers and date, full crown and shield and cross, somewhat thin but not visibly corroded, small edge-split, attractively toned. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0131. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($500-750)