Complete date-run of 15 Potosi, Bolivia, cob 1R of Philip IV, assayer E, as follows: 1652, 1653, 1654, 1655 (PH at top), 1656, 1657, 1658, 1659, 1660, 1661, 1662, 1663, 1664, 1665 and 1666. S-P37a; KM-13. 46.76 grams total. Fine on average, all toned, mostly good crosses and pillars, clear dates and assayers, a couple salvaged, the 1653 plugged and the 1663 holed. SEE INTERNET FOR PHOTO. (Estimate: $500 - 750)