Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip II, assayer M to left, unique error with denomination as "III," ex-Yucatan wreck. S-P2; KM-4.2; CT-323 (under Lima). 12.22 grams. VF details but with light surface corrosion and part of edge lost (also darkly toned as not completely cleaned), clear P-M and nearly full king's name, good full cross and shield and nearly full crown, curious error denomination. From an unidentified ca.-1590 wreck off the Yucatan peninsula of Mexico, and pedigreed to our Auction #15, with original lot-tag #288. (Estimate: $250 - 375)