Watch List notes:

Potosi, Bolivia, cob 4 reales, 1667 E. S-P37a; KM-18; Cal-unl. 13.19 grams. Crude flan with uneven thickness (much flatness) and partially crude edge but otherwise AVF with slight surface porosity, off-center strike, bold date and denomination between pillars, second date below most of cross, trace of P at beginning of king's name in legend (hence posthumous Philip IV, as expected), lightly toned in crevices.
($250-375)