Watch List notes:

Potosi, Bolivia, cob 1/4 real, Philip III, no assayer, shield around castle, large lion without shield (ca. 1620), very rare. KM-unl; CT-unl. 0.58 gram. Thin and dark from corrosion (salvaged AXF) but with clear castle and lion, distinctive style (from a period that was not supposed to have any 1/4R), full crown.
($200-300)