Watch List notes:

Potosi, Bolivia, cob 1/2 real, Philip II, assayer M below, mintmark P to left of monogram, rare, ex-Ugaz. S-P2; KM-1.2; Cal-138. 1.79 grams. Nice, fairly even strike on a broad planchet, XF details overall though with a plugged hole to left of cross, complete monogram and cross with nearly all of the legends on both sides also visible (uncommon to see). Pedigreed to the Jorge Ugaz collection.
($125-200)