20 Diners - Joan Martí i Alanis Customs Union

Andorra lacked formal coinage of its own until 1982, when the co-princes — the French President and the Bishop of Urgell — authorized a domestic series primarily aimed at the collector market. This 1992 piece commemorates the European Customs Union at a pivotal moment: Andorra had only formalized its customs agreement with the European Community in 1990, ending centuries of ambiguous trade status for a microstate that had functioned as a smuggler's corridor between France and Spain.

The bimetallic construction — sterling silver with a gold inlay — was technically demanding for its era and drove production costs well above face value. Joan Martí i Alanis served as Bishop of Urgell and co-prince from 1971 to 2003, making him one of the longer-tenured holders of that feudal office in the modern period.