Watch List notes:

Potosi, Bolivia, cob 8 reales, 1721 Y. S-P43a; KM-31; Cal-1557. 26.81 grams. Chunky flan with crude edge (as made) but high grade for the period (AU), with clear date between full pillars, full cross, two bold assayers, toned in crevices, scarce date. Pedigreed to the Jorge Ugaz collection.
($300-450)