Watch List notes:

Potosi, Bolivia, cob 4 reales, 1751q. S-P52; KM-39; CT-439. 12.57 grams. Well-centered strike with very bold full cross and pillars-and-waves, two dates, AVF with darkly toned fields and very light surface porosity (possibly salvaged), scarce (missing in Karon). (Estimate: $300 - 450)