Watch List notes:

Potosi, Bolivia, cob 8 reales, 1650O, with crowned-O countermark on cross. S-P35; KM-19b; CT-509. 26.12 grams. Bold full cross with nearly complete countermark but flat periphery except for date, full crown atop nearly full but off-center shield with clear assayer to left, corroded around edge on obverse only. With Marex tag #91-8R-0565. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $350-500