Any ID on these exceedingly awful switches?

[RooMba]

I found an old Motorola development terminal from 1982, and it also happens to feature the worst switches I have ever seen in a keyboard.
They are a linear spring-over-membrane design with a cross mount, and features an internal as well as an external coil spring.

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Also a weird metal disk that sits on the base of the mount.

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Very intriguing