Potosi, Bolivia, cob 1/2 real, Philip II, assayer B/A to left, rare. S-P12; KM-unl (1.3). 1.58 grams. Big B clearly punched over a small A to left of a full monogram (no mintmark), full crown, choice full cross with full legend on that side, toned VF with some old scuffing on high points. (Estimate: $125 - 200)