Seville, Spain, gold cob 1 escudo, 1597/6 date to right, assayer not visible (B below mintmark S to left), very rare (unlisted overdate), NGC AU 55, finest and only example in NGC census. Cal-unl (Type 229); Fr-178. 3.36 grams. Full date with bold and clear 7/6 to right of full shield (left side off the flan), full but slightly off-center cross, much encrustation in crevices.
Estimate: 2000 - 3000 USD