20 Deutsche Mark

The 20 Deutsche Mark series spans several distinct issues across the Bundesbank era, and without a Pick number or series date it's impossible to say which specific note this refers to. What can be said generally: the Bundesbank was unusually deliberate about redesigning its notes to stay ahead of counterfeiting technology, and each new series represented a policy decision as much as a design one.

If this is a pre-1991 issue, paper composition alone made these notes susceptible to wear along the fold lines — a known weakness of that generation of German federal notes before polymer elements were introduced into the substrate.