Watch List notes:

Potosi, Bolivia, cob 2 reales, 1667E with 1666 date on pillars side, Charles II, unique. S-P37b; KM-unl (24 for type). 5.44 grams. Broad-flan About Fine with full pillars, off-center cross, clear 67 date below cross and 66 between pillars (first we have seen), a significant muling because all 1666 coins are all Philip IV whereas you can see just enough of the king's name in the legend on this coin to know it is Charles II, some toning on fields.
($200-400)