Vintage Double Swing Arm Cast Iron Oil Lamp Holder Sconce with Wall Bracket - Here are some measurements.  The back wall mount bracket measures 5-1/8" x 2-3/4".  The inside diameter of the bowl where the oil lamp sits measures approximately 3-7/8".  The outside diameter measures approximately 5-1/4".   From the wall mount bracket to the outer edge of the bowl measures about 9".  The wall mount bracket has a triangle shaped logo on the back with what looks like two or three letters that are unreadable. I could not find the maker.  Overall condition is very good showing some small rust spots and one larger spot on one of the bowls (see 6th picture).  They could be touched up with a little black paint if desired.  The screws are not included.  This is a very nice and old double bracket set.  Please review pictures as they are part of the description and email me any questions.