It's amazing how they had a whole stamped metal frame in there to stiffen it up. Like what was the design criteria that made them think they needed all that steel? Violent cavemen users?
You could hear a former typist from the other side of the building even on a rubber dome keyboard.
Also most keyboards from the era were “similar” since the switches were somewhat of a standard. It wasn’t until the PC market took off and went nuts that cost cutting and other developments began - especially in the portable/laptop area.
The Model M wasn't nearly as impressive, or durable, as the Model F that preceded it and which was included with the IBM PC. Those keyboards had metal housings, unlike the plastic housings of the Model M.