Watch List notes:

Silver "plata corriente" cut piece of an ingot, 28.58 grams, marked with Philip II tax stamp Approx. 1" x 3/4" x 3/8". Edge piece broken from a "splash" ingot, with tax stamp showing HISPAN(IARVM) on one side, the other side flat, lightly encrusted and noticeably circulated, unlike the pieces found on shipwrecks. From a Spanish colonial site in the southern Caribbean

Estimate: $500