5 Francs / Franken = 4 Mark

This note emerged from one of the more awkward monetary arrangements in early twentieth-century Europe. Luxembourg was simultaneously part of the German Customs Union and tied to the Latin Monetary Union through its franc-based currency — hence the dual denomination, 5 Francs equaling exactly 4 Mark, printed on a single face to satisfy both obligations at once.

Giesecke & Devrient's Leipzig plant produced the note just as German forces occupied the Grand Duchy in August 1914. Whether any pre-occupation stock reached circulation before the military administration imposed its own financial controls is not firmly established.