Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651E/O, with crowned-L countermark on cross. S-P36; KM-19b; CT-512. 22.92 grams. Bold date and full countermark, full shield with bold P-E/O to left (scarce over-assayer), light surface corrosion and toning, edge-split. With Marex tag #91-8R-0140. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $400-600