IBM Tablet Type 7344
This tablet is actually some sort of industrial control computer from Japan. Instead of just being a screen to a computer build-in to some kind of machinary, this is an entire 486 computer with it's own hard drive and ports. Originally the screen was vinegarised but impossible to replace - so I de-vinegared it with IPA and managed to find polarisers which were suitable to get a good colour image.
Also doing it without damaging it or the touch controls was no easy feat!
As you can see the machine is like one massive metal heatsink - really rugged and with a hard wired DC input alongside the regular older 4-pin thinkpad connector.
It boots up mostly in Japanese but it seems to boot largely like a 700C would, with, at one point a menu allowing you to choose between operating systems, but it largely ignores what you input because it has some kind of auto boot process taking you into OS2 and some machine control program.
I haven't got as far as circumnavigating this program but it's a lovely little weird machine from IBM japan.
I did manage to find a little info on it. Seems to be based on a 560Z motherboard and my one is an upgraded 7344-TV3 (P100MHz, VGA 10.4", Base 8M, HDD 1G/3G).
Some other pages talking about this machine (in Japanese) are here: