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

• SunTour 4
• SunTour 4
• Wide
• SunTour 4

I think that the correct labels might be:

• SunTour 4
• SunTour 4
• SunTour Wide
• SunTour 4

---

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: SunTour
• Derailleurs: SunTour 4, Suntour 8.8.8. Wide