Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651E (modern 5), with crown-alone countermark on shield.S-P36; KM-19b; Cal-1491.18.32 grams.Evenly corroded with plenty of detail remaining including visible date and clear countermark, a few edge-cracks.With certificate.From: Capitana, sunk in 1654 off Chanduy, Ecuador
($350-500)