1 Mark Wohltätigkeitsbazar

Castrop was a mid-sized Ruhr industrial town whose municipal notgeld program in 1921 extended well beyond emergency currency into something closer to civic promotion. This particular piece was issued specifically for a charity bazaar — a "Wohltätigkeitsbazar" — rather than through normal trade channels, which means its circulation was closed, brief, and geographically confined to a single event. That origin largely explains why surviving examples can appear either pristine or heavily handled, with little middle ground.

Herta von Gumppenberg was among a small group of women designers active in the Weimar-era notgeld scene, a detail the catalog number quietly obscures.