Watch List notes:

Potosi, Bolivia, cob 8 reales, 1620 (T), quadrants of cross transposed, Grade 2. S-P21; KM-10; Cal-930. 18.06 grams. Very small, thick flan (looks like a 4R) with clear date, full but doubled shield, most of cross, light surface corrosion and probable edge-loss. With Fisher tag and photo-certificate 85A-173353. From: Atocha, sunk in 1622 west of Key West, Florida
($700-1000)