Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip II, assayer B (3rd period). S-P10; KM-5.1; Cal-672. 26.84 grams. Presumably toward the end of B's 3rd period there was a change to a new castle design, both in the shield and the cross, with six tiny windows around a large main opening (Sellschopp #185), and this is arguably the finest known example, with superbly detailed full shield and cross-lions-castles, full crown, bold P-B and denomination, fully AU with no toning except for a dark brown stain near edge on reverse. Pedigreed to the Jorge Ugaz collection.
($300-450)