1 Gulden 'Saint Philip Gulden' - Charles V

The "Saint Philip Gulden" takes its name from Philip I of Castile — Philip the Handsome — who governed the Low Countries as nominal ruler before his death in 1506 left Charles, then a child of six, as heir to the Burgundian Netherlands under regency. The coin was struck throughout the regency period and into the early years of Charles's own rule, meaning it spans one of the most dynastic transitions in northern European history. Holland's mint output during these years was complicated by chronic bullion shortages and competing municipal mint rights.

The relatively low gold fineness of .663 reflects deliberate policy, not accident — Burgundian-Habsburg monetary ordinances repeatedly adjusted alloy standards to keep coin in circulation rather than hoarded or exported.