500 000 000 Mark Bergwerksgesellschaft Hibernia

Hibernia was one of the Ruhr's dominant coal-mining companies, and like dozens of major industrial firms during the hyperinflation of 1923, it was authorized to issue its own emergency currency — Notgeld — to pay its workforce when Reichsbank notes couldn't keep pace with collapsing purchasing power. This note, denominated at 500 million Mark, was issued at a moment when that sum bought roughly what a few pfennigs had purchased four years earlier.

Printed in Herne, where Hibernia maintained its administrative headquarters, the note reflects the industrial Notgeld practice of issuing currency backed by company credit rather than state authority — a stopgap that dissolved almost as quickly as the inflation it was created to address.