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

• Wide
• -
• Skitter
• Wide

I think that the correct labels might be:

• SunTour 8.8.8. Wide
• SunTour 8.8.8. Wide
• SunTour Skitter
• SunTour 8.8.8. Wide

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: SunTour
• Derailleurs: SunTour 8.8.8. Wide (5th style), Suntour 8.8.8. Wide, SunTour Skitter (1st style)