This is a Vintage Smith Victor GL43 4 Socket Movie Photography Light Bar.  It comes in a real nice Metal Case.  The case has two clasps on each end.  This is fully tested and Works Great!.  One switch controls the two outside bulbs and the other switch controls the two inside bulbs.  It can be mounted or used with the solid handed that screws in.   All sockets work, I only had two LED bulbs to test it out with.  This comes from a smoke free home.