Watch List notes:

Potosi, Bolivia, cob 8 reales, 1649O/Z(?), with crowned-dot-F-dot countermark on shield. S-P35; KM-19b; CT-507. 27.43 grams. No corrosion, bold full countermark next to clear assayer (over-assayer not 100% certain), full denomination, date, cross and shield despite minor flat areas, lightly toned. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $400-600