Watch List notes:

Potosi, Bolivia, cob 8 reales, (1617)M, mintmark (and other P's) as IO. S-P19; KM-10; CT-129. 27.15 grams. Full shield and cross (the latter doubled) with minor flat spots, much legend including king's ordinal III, interesting makeshift mintmark, VF with light toning.
($200-300)