This is the classic IBM Model M keyboard that's seen me through my entire professional career -- Fourteen years and five employers, across four cities and two states, always plugged into a machine named lunchbox.
Manufactured back in 1988, I purchased it eleven years later for $5. Aside from needing the occasional cleaning, it's still going strong, 25 years after it came off the line in Lexington, Kentucky.
I have another Model M on my workstation at home, and two more safely stashed in a trunk. They just don't make them like they used to. Oh wait, they still do.
These are the most bestet keyboards evar.