Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip IV, assayer E (1660s). S-P37a; KM-21. 19.90 grams. Interesting coin with natural bubble-hole and cracks (also corroded), full pillars-and-waves and cross, lightly toned. With ROBCAR photo-certificate #M180129. Recovered from: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador
(125 - 200 USD)