Potosi, Bolivia, cob 4 reales, Philip III, assayer not visible, Grade 2, ex-Atocha (1622), mounted cross-side out in 14K gold bezel with shackle bail. 17.93 grams total; bezel weighs 6.93 grams. Well-detailed piece with original surfaces showing only minor saltwater corrosion, full shield with king's ordinal III below plus choice complete cross and castles-and-lions, nicely mounted. From the Atocha (1622), with Fisher tag and photo-certificate 85A-200630, including 2018 appraisal for $2,700.
Estimate: 1500 - 2250 USD