50 Pfennig

Aachen notgeld from 1918 sits at the intersection of two crises: the wartime metal shortage that drove municipalities across Germany to issue emergency fractional currency, and the administrative peculiarity of Aachen's dual Stadt- und Landkreis authority, which meant both urban and rural administrations fell under a single issuing body. J. P. Bachem was a well-established Cologne Catholic publishing house — their involvement in municipal printing work during the war was a natural extension of their commercial print operation rather than any specialist banknote capacity.

The DeNG 5/6 cataloguing places this among the earliest documented Aachen issues for the series.