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

• SunTour BL
• SunTour AG
• SunTour Cyclone
• SunTour BL GT

I think that more complete labels might be:

• SunTour BL S (3600)
• SunTour AG (3400)
• SunTour Cyclone Mark-II (3500)
• SunTour BL GT (3300)

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: SunTour
• Derailleurs: SunTour BL S (3600), SunTour BL GT (3300), SunTour AG (3400), SunTour Cyclone Mark-II (3500)