Potosi, Bolivia, cob 8 reales, 1617(M), denomination as O-III-V (rare), Grade 2. S-P19; KM-10; CT-129. 21.81 grams. Full cross with flatness in quadrants, full but lightly corroded shield with clear error denomination (O above III above V) above bold king's ordinal III. With Fisher hologram certificate #208234 (lacking last digit of date). Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $400 - 600)