Seville, Spain, cob 4 reales, Philip III, assayer D, Grade 3

Seville, Spain, cob 4 reales, Philip III, assayer D, Grade 3. Cal-Type 292; KM-36.2. 11.77 grams. Thick flan with surface corrosion, most of shield and (off-center) cross, clear S-D (the assayer not mentioned on the certificate). With original Fisher certificate 85A-222249 (tag missing, erroneously attributed to Potosi). From: Atocha, sunk in 1622 west of Key West, Florida
($300-450)