Potosi, Bolivia, cob 2 reales fragment, Philip III, assayer not visible, ex-Atocha (1622), mounted in rusted 14K bezel. 2.84 grams total. Neat mounting (vertical) with just one castle in evidence on the coin itself, the other side corroded. From the Atocha (1622), with Fisher photo-certificate #94A-5567.
Estimate: $150-225