Potosi, Bolivia, cob 8 reales, 1651E, with crowned-dot-F-dot countermark (4 dots) on shield. S-P36; KM-19b; CT-511. 24.36 grams. Full crown of countermark on full but off-center shield, mostly bold date outside full but weaker cross with patchy toning, minimal corrosion, small edge-split. With Marex tag #91-8R-0320. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island (Estimate: $400 - 600)