Seville, Spain, gold cob 4 escudos, 1593 date to right, assayer B below denomination IIII and mintmark S to left, NGC AU 55, finest known in NGC census. Cal-897; Fr-158. 13.56 grams. Broad flan with particularly sharp full date and assayer (rare thus), full king's name in legend, some peripheral crudeness and edge-crack, full cross-and-tressure, light yellow color, the finer of just two in the NGC census.
Estimate: 8000 - 16000 USD