10 Pfennig

Rieder is a small village in the Harz district of Saxony-Anhalt, and like hundreds of similarly sized German municipalities in 1921, it issued its own emergency small-change notes — Kleingeldscheine — to compensate for the acute shortage of metal coinage that persisted well after the First World War ended. The national mint simply could not keep pace with demand, and local authorities were legally permitted to fill the gap.

The DeNG reference distinguishes between variants a and b, almost certainly differing in serial number range, paper stock, or a minor typographic detail — distinctions that matter to specialists assembling complete Notgeld runs by municipality.