The company HMZ (Hessische Metallwerke, Gebrüder Seibel, Ziegenhain) was renamed mono-Metallwarenfabrik Mettmann in 1984/1985. In 1984, production in Ziegenhain was stopped and the factory building and land were sold.
Mono GmbH
Industriestraße 5
D-40822 Mettmann
mail@mono.de
