Watch List notes:

Potosi, Bolivia, cob 4 reales, 1659 E. S-P37a; KM-18; Cal-1126. 13.95 grams. Choice full pillars-and-waves (slightly off-center) and cross-lions-castles (well centered but very slightly doubled), XF with contrasting sediment on fields, two dates, all three mintmarks.
($250-375)