Watch List notes:

Potosi, Bolivia, cob 1 real, 1648R, extremely rare. S-P31; KM-12a. 3.43 grams. Very broad flan with full and clear 648 of date outside of full cross, clear P-R to left of full shield, darkly toned (probably debased) and with slightly greasy-looking surfaces but high grade (XF) and very important as the first clear specimen on record of this date and assayer in the minor denominations. (Estimate: $500 - 1000)