Vintage Charles Bruning 87-200 Electric Drafting Eraser Handheld Testing Works

Vintage Charles Bruning 87-200 Electric Drafting Eraser Handheld WORKING It has an engraving on it and does.work, however it starts off really slow for a few seconds before going what I assume it the normal speed. Or if you manually speed up the Rotating it'll immediately go quicker and maintain that Speed