Watch List notes:

Potosi, Bolivia, cob 1/2 real, (1652) transitional, monogram over cross with dots, rare, ex-Ugaz. S-P37; KM-unl; Cal-579. 1.99 grams. Choice AU with full and sharp monogram and cross, much retained luster with a little dark toning around the details, rare type (Mastalir Type Id). Pedigreed to the Jorge Ugaz collection.
($125-200)