Castellano - Enrique IV Segovia

The castellano was introduced by Enrique IV specifically to compete with the Aragonese florin and the growing penetration of foreign gold into Castilian commerce. Enrique's reign was a monetary disaster by almost any measure — his chronic debasement of the vellón coinage had so eroded public confidence that gold issues were struck partly to reassure merchants who had stopped accepting royal silver altogether.

Segovia's mint, powered by the Eresma river, was among the most technically capable in the kingdom. AB#672 places this squarely among the later issues of his reign, when Enrique was already fighting Isabel's faction for succession — a contest he would not survive long enough to resolve.