This design is the plain vanilla Simplex Tour de France. I can’t tell how it differs substantively from French Registered Design # 37803-001, except that the photos are clearer and the front derailleur is not included.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Lucien Juy
• Country: France
• Date: French application April 1953
• Derailleur brands: Simplex
• Derailleurs: Simplex Tour de France