50 Pfennig

Rieder is a small village in the Harz region of what was then the Province of Saxony. Like hundreds of similarly minor municipalities, it issued its own emergency currency — Notgeld — during the early 1920s when small-denomination coins had effectively vanished from circulation due to metal shortages and hoarding. The Gemeinde had no printing infrastructure of its own; these notes were almost certainly contracted to a regional printer, as was standard for small-town Notgeld at this scale.

The DeNG reference suffix ".2a-b" indicates at least two recognized varieties within this single denomination — likely color or paper stock variants, a common occurrence when municipalities reordered print runs from different batches.