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

• Mini Prestige 1964
• L. Juy
• L. Juy
• L. Juy

I think that the correct labels might be:

• Simplex Mini-Prestige
• Simplex SLJ5500 GT/SP
• Simplex LJ4000 T/SP
• Simplex LJ4000 CP/SP

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• Publisher: New Cycling
• Document: New Cycling May 1981 - Derailleur Collection
• Date: May 1981
• Derailleur brands: Simplex
• Derailleurs: SimplexSLJ5500 GT/SP, Simplex LJ4000 T/SP, Simplex LJ4000 CP/SP, Simplex Mini-Prestige