Potosi, Bolivia, cob 4 reales, Philip IV, assayer Z (1647-9). S-P34; KM-17a; Cal-Type 279. 14.02 grams. Bold full assayer Z (scarce) plus some shield and cross but rest of coin flat, with parts of edge crude, lightly toned About Fine, curiously overweight. Pedigreed to the Jorge Ugaz collection.
($200-300)