I found this on ebay for a song, and got it in the hopes of doing something with the keycaps. That turned out to be a non-starter, but I'm still interested in what, exactly, it is.
In teeny tiny little letters it says it's made by Keytronic.
The super-advanced photographic technique of "sticking a paper towel in front of the flash" let me diffuse the flashlight so it didn't wash out the printing on the chip.
I haven't the foggiest idea what this is for. The switches are linear and thoroughly "meh".