This is a recent acquisition. While it is a Cortron-ITW magnetic reed switches, keycaps have a Micro switch square mount. The only key different is the lit lock key with a round mount.
Here are some pics:
Top of keyboard mechanism
Corton-top.jpg (3.29 MiB) Viewed 2195 times
Rear PCB for the keyboard mechanism
Corton-rear.jpg (3.47 MiB) Viewed 2195 times
Front profile
Corton-frontprofile.jpg (3.03 MiB) Viewed 2195 times
Key switch and key top
Corton-keyswitch and keytop.jpg (2.99 MiB) Viewed 2186 times
Lit Lock key
Corton-litlock.jpg (1.95 MiB) Viewed 2186 times
Side profile
Corton-side profile.jpg (2.73 MiB) Viewed 2195 times