We are looking at RAFI RS 76 M switches.
Pink / salmon sliders. Linear long travel. Smooth as hell. PCB mount.
White and yellow sliders are also present.
I fail to find a production date on the PCB or anywhere else.
Kyocera...
The function row caps were originally blue. Now greenish. The LED caps have a plastic top.
Low profile dental doubleshots.

Metal backplate
The whole keyobard is quite low profile. No feet.
This will make a nice addition to my keyboard display shelf. I think this is one of the more unusual keyboards in my collection.