25 Pfennig

Gronau (Hannover) — not to be confused with the larger Gronau in Westphalia — was a small municipality with no independent monetary tradition before the wartime Kleingeldersatz emergency. This 25 Pfennig note belongs to the wave of locally issued Notgeld that flooded Germany from 1917 onward as coin hoarding stripped small denominations from everyday commerce. The official stamp was the magistrat's only practical authentication tool; printing infrastructure in towns this size was minimal.

At 39 × 29 mm, this is among the smallest Notgeld formats produced, leaving almost no margin for design elaboration.