Watch List notes:

Potosi, Bolivia, cob 8 reales, 1640, assayer not visible (TR or FR), rare. KM-19a; CT-483. 26.88 grams. Full and clear date with particularly bold 0 (rare thus), also one nice lion and nearly full king's name and ordinal but otherwise crude, Fine, with patchy black toning.

Estimate: $200-300