50 Diners - Joan Martí i Alanis Golden Eagle - Gold Bullion

Andorra's gold bullion program launched in the late 1980s as the principality sought hard-currency revenue outside its traditional reliance on tourism and duty-free trade. The 50 Diners denomination was anchored to approximately half a troy ounce, placing it in direct competition with the Britannia and Nugget issues then flooding the bullion market. Joan Martí i Alanis, the Episcopal Co-Prince referenced in the coin's title, held that role from 1971 to 2003 — one of the longest tenures in the position's history.

Andorran coinage of this period carried no legal tender status recognized beyond the principality itself, a consequence of Andorra's unusual constitutional position outside both the French franc and Spanish peseta systems it simultaneously used.