Electric Eraser made by Bruning. Marked on the end cap, "TT048".
Although it does work, there is a problem. When the switch is depressed, it tries to spin, but I have to give the eraser end a little twist to get it going. Once I help, it spins fine. I think the bearing either needs to be replaced. Or if possible, lubricated. As seen in the pictures, there is some loss of paint.
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