25 ECU - Beatrix Euro-Town Arnhem

The ECU — European Currency Unit — was never legal tender in the Netherlands or anywhere else, but a handful of member states issued commemorative pieces denominated in it anyway during the late 1980s and early 1990s, partly as pro-integration political signaling ahead of the Maastricht Treaty negotiations. The Dutch series leaned heavily into European city themes. Arnhem's selection here ties to its role as a cross-border commercial hub near the German frontier, though the "Euro-Town" designation was a promotional initiative rather than any formal EU classification.