Watch List notes:

Mexico City, Mexico, cob 1/2 real, Philip III, assayers F at top left and oD at bottom, mintmark oM at top right, rare, NGC F 15, finest and only example in NGC census. S-M14a; KM-20; Cal-unl. 1.42 grams. Full monogram with very bold full F at upper left and oD at bottom middle, the oM at upper right clear but weaker, also with good full cross and nicely toned all over, oddly misattributed to 1618-20 by NGC (actually struck ca. 1600). NGC #3153316-003.
($200-300)