These have been nicknamed the "Angel" -- they are mounted with a bracket under the top skirt -- the base is threaded to hold a fuse. each side has a terminal connecting across the fuse. all these mechanisms are intact on this one except for the fuse itself. top skirt is incuse marked 24/60M -- base is recess embossed MADE IN POLAND 20A 500V A16 -- overall height is 6 1/2 inches. Nice condition -- $95 plus actual postage