Potosi, Bolivia, cob 8 reales, Philip III, assayer B (5th period), ex-Atocha (1622), Grade 1, mounted cross-side out in 14K gold bezel with shackle bail. 32.08 grams total. Good full cross and shield, nice toning, minimal surface corrosion, thick and heavy but probably lightly shaved to conform to bezel. From the Atocha (1622), with Fisher certificate #191006.
Estimate: $800-1200