Quote:
Originally Posted by VINMAN
Possibly Bakelite. I worked on old crap like that when I started my job. Looks like some kind of rheostat or stepped motor control.
You would suprised how much stuff like this is still in operation.
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That is slate. The wiring is all on the back and was insulated by brushing with shellac. I worked in a place that had an old hydro generator and that was how it was wired.