My rough translations of the photo captions, from left to right, are:

• Fuji Speed-X
• (Part) lever

I think that these labels are probably the wrong way around!.

Hiroshi Nakamura, writing in Cycle History 11, shows the Speed-X as being manufactured by a company called 'Saito'. However, these pictures clearly show it branded as a Fuji product. The lever is labelled 'The Nichibei Shoten Co.' - which is the name of the company that owned the Fuji bicycle brand.

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• Publisher: New Cycling
• Document: New Cycling May 1981 - '81 Derailleur Collection
• Date: May 1981
• Derailleur brands: Fuji
• Derailleurs: Fuji Speed-X