50 000 Mark Duisburger Kupferhütte

Duisburger Kupferhütte was one of Germany's major copper smelting and refining operations, located on the Rhine in Duisburg. During the hyperinflation peak of 1923, large industrial employers routinely issued their own emergency currency — Notgeld — to pay workers when Reichsbank notes were either unavailable in sufficient quantity or worthless by the time payroll was processed. This note was functional wage currency, not a collector issue.

The 50,000 Mark denomination places it in the mid-hyperinflation window, before denominations climbed into the billions later that autumn.