Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip II, assayer O below mintmark oM to right. S-M11; KM-36; CT-333. 10.21 grams. Bold full shield and cross (the latter very slightly doubled), somewhat corroded in peripheries. With certificate. Recovered from: Santiago, sunk in 1585 off on the Bassas da India atoll between Mozambique and Madagascar (east of Africa)
($125-200)