My random translations of the photo captions, clockwise from top left are:

• Tour de France 1947
• Tour de France 1948
• Tour de France (Italy) 1948
• Tour de France 1948

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Simplex
• Derailleurs: Simplex Tour de France, Simplex Tour de France (Italy)