Potosi, Bolivia, cob 8 reales, 1651E, with crowned-dot-F-dot countermark on shield. S-P36; KM-19b; CT-511. 21.00 grams. Bold countermark on full shield, full but off-center cross with full date, lightly corroded and toned all over. With Marex tag #91-8R-0962. Maravillas, sunk in 1656 off Grand Bahama Island
Estimate: $300-450