Potosi, Bolivia, cob 4 reales, Philip V, ex-Princess Louisa (1743), mounted cross-side out in 14K gold bezel with shackle bail. 15.71 grams total. Nice bold cross and some pillar detail on this corroded piece, probably lightly rounded on edge to fit into the gold bezel. From the Princess Louisa (1743), with certificate and booklet.
Estimate: 250 - 375 USD