The back label, which was unfortunately torn or cleaned off by the seller. Thankfully, there's still a photo:
Learning System Sciences appears to be a complete mystery. Possibly an internal development team at IBM, or a customer training division.
The PN which follows IBM's general syntax seems to indicate that this was some sort of a prototype for their 4693 POS keyboards, which were some flavor of rubber dome. This one isn't:
Construction is very much prototype-ish.. self tapping screws, flimsy case, etc. I'm surprised that they used a plate.
The bigger the glob, the better the job:
There are two cables - one is a short PS/2 female, the other is a standard long coiled PS/2 male.
Actual manufacturer was not IBM - I'm guessing that this is around the time where they no longer had any keyboard manufacturing ability:
Further cementing prototype or other design stage project, Promed Keyboard Group is an interesting company that's still around.
The seller had one more keyboard of the same type, obviously made by TG3 (much beefier) and possibly a later stage prototype, but after buying it they either didn't want to sell it to me anymore and/or shredded it by mistake, claiming that they can't test it even though I told them I don't care. Oh well, not like I have keyboard space anymore at this point
