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

• Eagle
• Eagle
• Eagle II
• Eagle GT

The image at the bottom-right-hand corner is labelled 'Eagle' but is might be better described as a Shimano Eagle GTO.

So I think that the correct labels might be:

• Shimano Eagle (DE100)
• Shimano Eagle
• Shimano Eagle II (EG10)
• Shimano Eagle GT

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• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Shimano
• Derailleurs: Shimano Eagle (2nd style), Shimano Eagle (DE100), Shimano Eagle II (EG10), Shimano Eagle GT