This is one of the earliest patents for a German derailleur. This three speed derailleur was manufactured and sold - there is a Wanderer bicycle fitted with an example in the Industriemuseum in Chemnitz.

• Publisher: Deutsches Patent- und Markenamt
• Inventor: Wanderer-Werke vorm. Winklhofer und Jaenicke AG
• Country: Germany
• Date: Priority date October 1932
• Derailleur brands: Wanderer, J.Wi.S
• Derailleurs: Wanderer