25 Pfennig

Blankenburg am Harz issued this Notgeld note in the chaotic early Weimar period, when hundreds of German municipalities were printing their own small-denomination scrip to address the severe shortage of fractional coinage. Louis Koch was a Halberstadt commercial printer — not a security printing house — which is exactly what you'd expect from a town of Blankenburg's modest scale. The reference number suggests this belongs to a documented series of at least four to five known varieties, likely distinguished by color, serial range, or minor typographic differences rather than substantive design changes.