100 000 000 Mark

By August 1923, German municipal authorities were legally permitted — indeed, expected — to issue their own emergency currency as the Reichsbank lost all practical control over inflation. Coblenz sat within the French-occupied Rhineland zone, which added a particular layer of administrative complexity: local notgeld had to function under both German monetary law and the watchful eye of occupation authorities who had their own interests in Rhineland economic stability.

The hundred-million-mark denomination tells you exactly where this note sits in the hyperinflationary timeline — late summer into early autumn 1923, before the November Rentenmark reform finally broke the spiral. Printed locally, which was the only realistic option at that stage given the volume and speed of production required across hundreds of issuing bodies simultaneously.