25 Pfennig

Borstel is a small municipality in Pinneberg district, Schleswig-Holstein, and its appearance as a notgeld issuer in 1921 is entirely typical of the period when hundreds of German towns and villages printed their own small-denomination emergency currency to address the severe coin shortage following the First World War. What makes municipal notgeld from minor localities like this one collectible is precisely the scarcity that comes from tiny print runs serving tiny populations — these were not produced for collectors in the way that the decorative "Serienscheine" of larger cities were.

The DeNG reference places this within a well-documented cataloguing framework, but surviving examples from single-parish issuers in Schleswig-Holstein are genuinely uncommon.