Mexico City, Mexico, cob 8 reales, Philip III, assayer D, Grade 2. S-M18; KM-37.2. 24.97 grams. Clear oMD, nearly full shield and cross, solid but with light to moderate surface corrosion and typically silvery color. With Fisher certificate #183480. Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $350 - 500)