Potosi, Bolivia, cob 4 reales, Philip II, assayer B (3rd period).S-P10; KM-4.2; Cal-525.13.50 grams.AU with some original luster and light rainbow toning in the fields, a few minor contact marks, sharply detailed partial shield and cross.Pedigreed to the Arturo Rosenheim collection.From: Shield Type
($150-225)