Shield Type
Potosi, Bolivia, cob 1/2 real, Philip II, assayer B below, mintmark P to right of monogram (2nd-period B).S-P6; KM-unl (1.2 for type); Cal-unl.1.61 grams.Broad flan with full inner details including bold B and P, also much legend, lightly toned VF with faint old scratches.
Estimate: 100-150 USD