Watch List notes:

Potosi, Bolivia, cob 4 reales, (16)19(T), quadrants of cross transposed, Grade 2.S-P21; KM-9; Cal-777.10.03 grams.Clear 19 of date outside of full cross, good full shield despite moderate corrosion, typically silvery all over.With Fisher tag and photo-certificate #94A-6821. From: Atocha, sunk in 1622 west of Key West, Florida
($600-900)