The keyboard on that was sold by IBM as an external unit. They sold a couple of versions of it, some with built in TrackPoints, some without, and I believe ISO and ANSI layouts were available too.
Here's mine:
Much like the laptop, there was an external numeric keypad that you could get for that keyboard, too. Been hunting one of those for a long time now.
*Edit* Forgot to actually list the model number. That was the IBM Model M4-1 Space Saving Keyboard with Trackpoint.