Potosi, Bolivia, cob 8 reales, 1618 T, Grade 4. S-P21; KM-10; Cal-925. 17.68 grams. Oblong flan with much surface corrosion yet full and clear shield and cross, toned all over, most of date and assayer discernible. With Fisher tag and certificate 85A-169777. From: Atocha, sunk in 1622 west of Key West, Florida
($350-500)