Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip II, assayer C below erasure, very rare. S-P5; KM-5.1; CT-136 (under La Plata). 27.32 grams. Bold full shield and cross, full denomination o-VIII, much bold legend and crown, full but weaker P-erasure-C that nevertheless shows elements of the erasure you don't see on other examples (and there aren't many), AXF with only light toning in crevices. Note this issue was once thought to be La Plata.

Estimate: $3500