25 ECU

Greece's ECU coinage program in the early 1990s was tied directly to the country's push toward European monetary integration, issuing collector pieces denominated in the European Currency Unit ahead of the Maastricht Treaty's implementation. The ECU itself was never circulating currency in Greece — these were legal tender in name only, struck specifically for the collector market and official presentations.

By 1994, the ECU had roughly eighteen months left before the framework that would eventually replace it with the euro was locked in at the Madrid Summit of December 1995.