Watch List notes:

Potosi, Bolivia, cob 1/2 real, Philip III, no assayer, Grade 4, with tag only (certificate missing), UNIQUE denomination as from the Santa Margarita. KM-6.1. 0.61 gram. Broad flan but thin from corrosion and with some holes from same, most of cross and some of monogram in evidence, significant as the first 1/2R ever recorded from this wreck, and, as such, important and unique for a denomination set. With Fisher tag #802. Santa Margarita, sunk in 1622 west of Key West, Florida

Estimate: $500-1000