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

• Duopar
• Eco
• Success
• Eco

I think that the top-left-hand photo does not show a 'Huret Duopar', but in fact, shows the lower-priced Huret Duopar Eco.

So I think that the correct labels might be:

• Huret Duopar Eco
• Huret Eco
• Huret Success
• Huret Eco

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• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Huret
• Derailleurs: Huret Success, Huret Duopar, Huret Eco, Huret Eco