Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651E, with crowned-L countermark on cross. S-P36; KM-19b; CT-511. 20.32 grams. Full but partially flat but uncorroded shield, moderately corroded cross with full countermark nonetheless (date weak but certain). With Marex tag #91-8R-0884. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $300-450