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This is the chassis from a SAGEM TX-20 teleprinter keyboard. The switches were Cherry M7 Style D (UncleFan received the different types and I have one of the regular switches).

The space bar position has four holes, but it is not clear why. UncleFan reports that no switches had four terminals; the photo from 10ko shows the switch removed but two holes still containing solder, indicating that only two holes were used.

The photos are from 10ko and were taken in 2010.