Watch List notes:

Potosi, Bolivia, cob 8 reales, 1628P. S-P25; KM-19a; CT-469. 26.82 grams. Bold date and full mintmark-assayer (rare thus), also denomination dot-oVIII-dot, good full shield and cross-and-tressure with flat spot in centers (also curious castle punch missing left-side balcony), XF with traces of orangish sediment. From the ca.-1629 "Panama hoard."
($400-600)