Not familiar with those terms but did a quick google and found them listed in this "Movement Controllers Handbook". There are likely some better references but this was the first reasonable looking one I found in English.
That makes sense, thanks. It appears to be some sort of airline / passenger service keyboard.
These are the first EnduraPros that I've ever had. They're not really comparable externally to any IBM or Lexmark Model M I own.
They use 2-piece keycaps (the metallic grey type) for every letter except the letters surrounding the trackpoint (because those keys have an indent where the trackpoint shaft goes) and the Windows and Alt keys, which are all one-piece. The tops of the 2-piece keycaps are uniformly yellowed; they're not really salvageable except as a dye-job. The 1-piece keytops are not yellowed very much if at all. But in general, this particular keyboard is from 2006 and I have keycaps from 1986 that look a lot better.
The case is a lot less sturdy (I ruined one putting it through the dishwasher even though I didn't let it go into the dry cycle). It warped a bit. I managed to chip off a bit next to the mouse buttons while putting it back together too. Pretty bad.
On the other hand, this thing is great to type on. Really excellent. Maybe better than any other Model M I own (likely due to newness).
I wish, though that Unicomp didn't need to give in to the pressure of the market to offer this cheaper variant, because, it's.. well.. kinda cheap. I think I might keep one of these and try to resell two of them on on EBay. Or give them to friends. Or something.
