Watch List notes:

Potosi, Bolivia, cob 4 reales, (1651-2)E, with crowned-•F• (two dots) countermark on shield. S-P36; KM-17b. 13.46 grams. Choice full countermark on nice full shield with full P-E to left, full but weaker cross, minimal corrosion, nice toning, tiny edge-split. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0334. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($300-450)