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

• Dura-Ace EX
• Shimano 600AX
• BMX
• Dura-Ace aero AX

The image labelled 'Dura-Ace aero AX' might be better described as a 'Dura-Ace AX'. The image labelled 'BMX' does not show the similar, classic, Shimano SX BMX derailleur, but a more basic model called the Shimano M2 that I believe was often fitted on more normal kids bikes.

I think that the correct labels might be:

• Shimano Dura-Ace EX (7200)
• Shimano 600 AX (6300)
• Shimano M2 (M200)
• Shimano Dura-Ace AX (7300)

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Shimano
• Derailleurs: Shimano Dura-Ace EX (7200), Shimano Dura-Ace AX (7300), Shimano 600 AX (6300), Shimano M2 (M200)