Potosi, Bolivia, cob 4 reales, 1666 E, NGC genuine / Piedmont. S-P37a; KM-18; Cal-1133. Weak strike and lightly corroded, silvery and very low in contrast, but with technically full pillars and cross and three dates. NGC #3104323-133. From: Piedmont, sunk in 1795 off Cornwall, England
($200-300)