50 ECU - Paneuropean Union Winston Churchill; Edward Heath

The Paneuropa-Union, founded by Richard von Coudenhove-Kalergi in 1923, issued a series of gold ECU pieces in the early 1970s as privately struck medallic coinage — not legal tender of any state, but carrying denomination designations that anticipated the European Currency Unit by nearly a decade. The pairing of Churchill and Heath on this 1972 issue is pointed: Churchill had called for a "United States of Europe" in his 1946 Zurich speech, while Heath had just steered Britain into the EEC that same year, with accession taking effect January 1, 1973.

The ECU designation here is the Paneuropa-Union's own construct, predating the official ECU established by the EMS in 1979.