Here is what appears to be a vintage potentiometer/rheostat. I believe it was designed to control the blower motor on a blacksmithing forge. Item is untested and in found condition. Would look amazing on the side of a vintage forge. I would imagine this could Control the speed on other things powered by electric motors. I always thought it would be cool to make it control a ceiling fan in a workshop. So check out the pictures and see what you think. There are no hidden shipping or handling fees. Item is shipped in a priority mail medium flat rate box. Thank you for your interest.