Potosi, Bolivia, cob 4 reales, Philip II, assayer B (3rd period). S-P10; KM-4.2. 13.03 grams. Great full shield and cross with contrasting toning around the details to enhance what is otherwise only a Fine example. Albeit weak on this example, the makeshift B assayer-mark on this coin appears to be a combination of S and X punches, once thought to be discrete assayer-marks on their own (but without any mint records to support that theory). (Estimate: $100 - 150)