... I know that keyboard. I know that keyboard and company very, very well.
Is it metallized sticker overtop the IBM logo or is it the CUBE OEM'd one with the rectangular cutout?
Okay, so I probably should do the background thing. CUBE turned into Xand around.. I think it was 96, 97? Anyhow, around '89 through about then, their specialty was top dollar PCs basically. (Which was incredibly STUPID when Dell was doing their best to crash both the price and margins, but I digress.) To that extent, CUBE had a habit of shipping - no surprise - top dollar keyboards with them. As I recall, keyboard options were basically IBM for "compact" and with servers, and Northgate. Don't quote me on Northgate availability though - I mean seriously, we're talking 20 years ago.
One of the reasons I remember CUBE fairly well is because they were one of the companies stupid enough to buy into Scott McNealy's delusion that 'hey home users will pay $6,000 for Java and SPARC because we're Sun and we're awesome.' And the stories I could tell you of that godawful horrible terrible design they tried to push on OEMs... ugh. But anyhow, those horrid things shipped with PS/2 instead of Sun ADB and sort-of half-assed ATX compliance. End result? (They also shipped other SPARC based systems, but it's been far too long.) Anyhow, guess where else you're likely to find a $200-300 keyboard? You guessed it - shipped with a $6000+ system.