Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer M, quadrants of cross transposed, 16 points (Grade 3), hand-signed certificate from 1976. S-P18; KM-9; CT-242. 7.65 grams. Bold full assayer M, full but corroded shield and cross, dark gray encrustation all over (not fully cleaned), desirable as pre-"Mother Lode" find. With original hand-signed Fisher certificate #2930 from 1976 (Cape Coral Bank). Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $350-500