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

• SunTour VX
• SunTour Hero
• SunTour BL
• Mighty Click

I think that more complete labels might be:

• SunTour Vx (2200)
• SunTour Hero
• SunTour BL (3200)
• SunTour Mighty Click (2700)

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: SunTour
• Derailleurs: SunTour Vx (2200), SunTour Hero, SunTour BL (3200), SunTour Mighty Click (2700)