Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip III, assayer M (pre-dated issue).S-P18; KM-10; Cal-919.25.63 grams.XF with surface corrosion and spots of reddish staining, weak but full shield with some doubling, nice cross, a lot of legend detail visible including cross fleury on reverse.From: Shield Type
($150-225)