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

• Pecker
• Lark
• Lark
• Lark

I think that the correct labels might be:

• Shimano Pecker
• Shimano Skylark
• Shimano Lark
• Shimano Lark

• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Shimano
• Derailleurs: Shimano Pecker (1st style), Shimano Skylark, Shimano Lark black (2nd style), various Shimano Lark models