Watch List notes:

Mexico City, Mexico, cob 1/2 real Royal, 1727D, rare. S-M23a; KM-24; CT-1838. 1.71 grams. Bold XF with usual hole at top-edge, nicely toned, with small die-break on 7 of date, making it look a little like 7/5. Pedigreed to the Santa Rosa de Lima collection.

Estimate: $500