...Assembly plant, and he told me how they tested the keyboars, they ran through a vibrating conveyor belt, that shook the heck out of them. They then were tested thouroughly. They had a god reputation for quality control. I remember I had one at home, and had to get rid of it after several years. It outlasted several others.
At work I remember back then keyboards were expensive, I used to canabalize the keys, or save them for parts. I replaced several cords that were broken, or had bent pins when users "tried" to plug them the wrong way. The call usually started with "My keyboard does not work anymore". 9 times out of 10 it was the bent pins.