Potosi, Bolivia, cob 8 reales, 1618, assayer not visible, Grade 2. KM-10. 24.47 grams. Nice full cross-and-tressure with bold date showing the 8 punched over another 8, the shield also full and well-detailed but with left side moderately corroded. With Fisher certificate #198368 (misattributed to assayer B). Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $400 - 600)