1990 AD., Luxembourg, Jean I, 50 Francs, KM 66.

Luxembourg, Jean I (1964-2000), engraver: J.N. Lefèvre, 1990 AD.,
50 Francs (22,8 mm / 7,00 g), nickel, 7,00 g. theor. mint weight, mintage 2,010,000 , coin alignment ↑↓, reeded edge,
Obv.: JEAN GRAND-DUC DE LUXEMBOURG / J.N.L. , his head facing left, engraver´s initials below.
Rev.: 19 - 90 / 50 F / I M L / LËTZEBUERG , crown divides date above value, IML (bank "Institut Monétaire Luxembourgeois") and country below, weak strike at crown.
KM 66 .

Year / Mintage
1989 2,000,000
1990 2,010,000
1991 2,010,000 (in sets only)
1992 10,000 (in sets only)
1993 10,000 (in sets only)
1994 10,000 (in sets only)
1995 10,000 (in sets only)

Grand Duke Jean of Luxembourg (given names: Jean Benoît Guillaume Robert Antoine Louis Marie Adolphe Marc d'Aviano; born 5 January 1921) ruled Luxembourg from 1964 to 2000. He is the father of the current ruler, Grand Duke Henri, and the son of Grand Duchess Charlotte and Prince Felix of Bourbon-Parma.
On 10 May 1940, Germany invaded Luxembourg, beginning a four-year occupation. Having been warned of an imminent invasion, the Grand Ducal Family escaped the previous night. At first, they sought refuge in Paris, before fleeing France only weeks later. Jean went to Canada, where he studied Law and Political Science at Université Laval, Quebec City.
He joined the British Army as a volunteer in the Irish Guards in November 1942. After receiving officer training at Aldershot, Jean was commissioned as a Lieutenant in March 1943, before being promoted to captain in 1944. He landed in Normandy on 11 June 1944, and took part in the Battle for Caen and the liberation of Brussels. On 10 September 1944, he took part in the liberation of Luxembourg before moving on to Arnhem and the invasion of Germany. After the war, from 1984 until his abdication, he served as Colonel of the Regiment of the Irish Guards, often riding in uniform behind Queen Elizabeth II during the Sovereign's Birthday Parade. Grand Duke Jean abdicated on 7 October 2000, and was succeeded on the throne by his son Henri.