This one turns out to have really nice dye-sub (or laser-printed?) key caps also, equipped with a dial.
The switches are tactile and upon close inspection should be rubber-dome with sliders.
I would say, however, that their feel is probably like the Topre 55g or even slightly more distinct and heavier in its tactility.
It has two plastic feet.
And a connector similar to that in the Tektronix terminal keyboard, however with only 4 pins instead of 6.
My unit comes with this adapter. It seems that someone tried to fit this keyboard to some other system.
The PCB is from "Advanced Input Devices".
Its dome sheet is very thick in light grey color.
After a bit of investigation, I found that this keyboard was designed for Tektronix's PRISM GPX Logic Analyzers 3000 Series, for their 3001 models as an optional keyboard, and for their 3002 models as main keyboards.
http://www.tek.com/datasheet/gpx-logic- ... 000-series
These "3001 Portable Mainframe", "3002C Color Modular Mainframe", "3002P Portable Modular Mainframe" logic analyzers with only 100-MB Hard Disk are perhaps still useful for today's engineers?
