5 Pfennig Bayerische Stickstoff-Werke

Bayerische Stickstoff-Werke was a synthetic nitrogen fixation plant in Trostberg, Bavaria — one of several industrial facilities that issued its own emergency currency (Notgeld) in 1919 when small-denomination coinage had effectively vanished from everyday trade. The plant's workers needed change; the Reichsbank couldn't supply it; the company printed its own. This was not unusual for 1919 Bavaria, but factory-issued Notgeld is considerably less common in surviving collections than the municipal variety.

Trostberg's nitrogen works had been producing ammonia via the cyanamide process since before the First World War, largely for agricultural fertilizers — a sector that kept operating even as the war economy collapsed around it.