Watch List notes:

Potosi, Bolivia, cob 8 reales, (1)617M, Grade 2, with tag only (certificate missing). S-P19; KM-10; CT-129. 25.72 grams. Solid but crude, with nice full cross, full but doubled and off-center shield, bold assayer M, clear 617 of date, light surface corrosion, nicely toned. With Fisher tag #230049 (last digit of date not mentioned). Atocha, sunk in 1622 west of Key West, Florida

Estimate: $300-450