DISRAELI DOCUMENTS
French Registered Design # 46113-001
Publisher: L’Institut national de la propriété industrielle
Applicants: Lucien Juy
Date: French application December 1952
Derailleur brands: Simplex
Derailleurs: Simplex Juy 51
This design is the Simplex Juy 51, with its cable controlled chain tensioning device. Cunning but useless.
