Watch List notes:

Santo Domingo, Dominican Republic, 1/2 real, Charles-Joanna, assayer oF, with "C" countermark for circulation in Panama(?), extremely rare host (unique with countermark). S-SD1; KM-24; CT-189. 1.45 grams. It is hard to imagine a rarer piece than this for early Spanish colonial numismatics, as the coin itself is among only about ten known, and it is the first and only known specimen to bear a clear "C" countermark in center (believed to stand for Castilla de Oro, the original name for the region now called Panama), which heretofore has only been seen on Spanish coins of Ferdinand-Isabel. Somewhat thin and wrinkled, with piece of edge missing, it is nevertheless a very illustrative example for the legends are nearly full (broad flan) and the inner details are complete save for minor weak spots, lightly toned all over, no worse than VF overall.

Estimate: $2000