Watch List notes:

Potosi, Bolivia, cob 4 reales, (1617)M, vertical denomination (rare), Grade 2. S-P19; KM-9; CT-245. 12.84 grams. Bold but doubled cross, full but weaker (and off-center) shield with full and curious mintmark large P over small P, faint but clear vertical IIII denomination to right, minimal surface corrosion. With Fisher/Miguel photo-certificate #V-1355 (misattributed to assayer T). Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $500 - 750)