Watch List notes:

Potosi, Bolivia, cob 8 reales, 1652E, very rare, with crowned-dot-F-dot countermark on shield. S-P36; KM-19b; CT-515. 20.49 grams. Very bold full date outside full cross, full but doubled shield with full but weak countermark, thin from corrosion, toned all over. With Marex tag #91-8R-1200. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $1250-2000