A NIB one of these just came in at the nonprofit recycler where I volunteer, and since I'm the resident KB maniac, I got first dibs.
It's an elegant board, with taupe (grayish brown) print on bone (being NIB, this one's keys and case are the same color) and in-key lock lights. I'm sure it's a Key Tronic. It has their big, retro-y alphanumeric characters (which I've always liked), although the text legends look more compact to me than the more recent KT's I've seen. It must've just been how they were back then; I doubt HP would've specified such a subtle difference.
For a non-mechanical board, this was made to high specs. The action is crisp, with something of a tactile bump, not at all mushy. It's
very quiet, too, even for an RD. This is probably due in large part to its unusually stable key buttons. When you run your hand across them, there's
no lateral travel, which makes them that much smoother to type on. By comparison my year-old Key Tronic Lifetime Series, though quite usable, feels and sounds more rattly.
Interestingly, these don't seem to have unique serial numbers—I see the "M/N" number above the barcode on this one is the same as Dorkvader's example.
Lots of RD boards come through the place, so I probably wouldn't have bothered with this one had I not seen this thread. So thanks for this nice addition to my collection,
bitslasher. (I'm glad someone else got the Necro Prize, too.)