Mexico City, Mexico, cob 1 real, Philip III, assayer F, mounted cross-side out in heavy silver pendant with 14K gold prongs and shackle bail. 8.11 grams total. Good full shield and cross, both nicely toned, probably lightly rounded on edge to fit the nearly round custom bezel of silver with gold prongs and bail. With photo-certificate.
Estimate: $125 - $200