original single antique american wall-mount chicago bank building wall sconce designed and fabricated by r. williamson & company, chicago, ills. the multiple components used in the sconce's assembly have a nicely aged surface patina. the sconce contains a turned and tapered canopy that mounts flush against the wall. the single arm is affixed to a single bryant shell socket with working paddle switch. the bell-shaped cover concealing the sockets is original and tightly affixed to the ball finial. great overall condition, considering age. chicago-based gas and electrolier supplier, r. williamson company, was established in 1882 by richard williamson after seeing the great magnitude and need or demand for lighting fixtures in the city's commercial and residential structures. willliamson first opened a small plant on the far northwest side of the city on chicago on milwaukee avenue. by 1889 he moved his business to 205 randolph steet in what was then the "heart of chicago." in the 1890's r. williamson & company had taken on the rank as one of the leading "lighting fixture" houses in the city. shortly after 1896 they moved to washington street where the factory was given additions as the company was one of the biggest suppliers to all states west of the mississippi river. during their peak in production, the company occupied over 115, 000 sq. feet of factory space populated by more than 500 workers in several various departments. priced individually. measures 18 x 33 inches.