It has not been tested. Seems to be in good condition. Feel free to ask any questions or more pictures. Im just a reseller and know nothing about this item. The tiny items in the box may or may not be whats supposed to be inside. Selling as PARTS ONLY This tool is being sold exclusively as a vintage collectible, laboratory tool, or hobbyist utility instrument (such as for jewelry polishing, wood carving, or fossil preparation). It is not intended, certified, or safe for anything.