Spain
Seville, Spain, 4 reales, Ferdinand-Isabel, assayer Gothic D to right of yoke on reverse, legends ending in ELISABE and LEGI, PCGS AU53.Cal-564; Lopez de la Fuente-unl.13.67 grams.Lustrous surfaces and choice inner details, the legends somewhat truncated by the size of the flan (also with tiny edge-split) but still with enough visible to determine this is an unlisted variety among the scores of dies already known for this issue.
Estimate: 350-500 USD