Although Mid-Century in design these were most likely manufactured during the 1930s. Original chrome back plate is difficult to see as it reflects most of the dark background. Minor wear to chrome back. Glass in excellent condition with no noticeable chips or cracks. Designed to diffuse the light from the bulb and also to focus the light downward with the angled rings on the bottom of the glass shade. Rewired with UL listed parts. 75 watts max each socket. Outlet disabled for safety concerns. Height: 4 1/2 inches add another 2 1/ inches for pull. Width: 11 1/8 inches Projection: 5 3/8 inches