Publisher: L’Institut national de la propriété industrielle

Applicants: Lucien Juy

Date: French application November 1935

Derailleur brands: Simplex

Derailleurs: Simplex Selection

I am more than a little confused about the model names of the many and various Simplex pre-war derailleurs.

I believe that this is Simplex’s second design of fork derailleur now featuring a simple pivoting fork. I also believe that it was called the Simplex Selection.