This is the second version of the seminal Simplex Tour de France - with a straight-sided main plate (see French Registered Design # 35579-001 for the first version).

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Lucien Juy
• Country: France
• Date: French application May 1948
• Derailleur brands: Simplex
• Derailleurs: Simplex Tour de France