Potosi, Bolivia, cob 2 reales, 1657E. S-P37a; KM-16; CT-905. 6.90 grams. Choice, Royal-like specimen with 100% full pillars-and-waves and cross-lions-castles, three dates and mintmarks and assayers, full king's name and ordinal, deeply toned VF. (Estimate: $200 - 300)