Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip II, assayer O below denomination oIIII to right, mintmark oM to left. 12.55 grams. Broad but not-quite-round flan with bold legends punctuated with weak spots, choice inner details (very sharp shield and cross), AU with contrasting toning, very light surface porosity.

Estimate: $175 - 250