Offered here is the top only to a Number 7 Eight Hour Lu-Mi-Num Carbide Lamp, manufactured by the Fred R. Belt Company in Chicago, Illinois. Patent date of 1924 with other patents pending. Includes the bail and hook, cam holders for the bottom, but no bottom. The Belt Company manufactured a smaller cast aluminum underground miners cap lamp as well as this cast aluminum superintendents lamp. Both lamps tough to find outside of collections. If you have a good bottom with a ratty top, here is the piece you have been looking for. Thanks for looking!