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

• Twin cable
• 1928 Rage (?)
• 1920

I think that the correct labels might be:

• Le Cyclo
• Le Cyclo 1928
• Le Cyclo - but I don't think it dates from 1920. Perhaps it means '1920s'

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Cyclo
• Derailleurs: Le Cyclo