original early 20th century antique american flush mount reinforced yellow brass interior residential backplate designed specifically for three push button switches. the nicely aged and heavily machined brass backplate was designed and fabricated by the the perkins electric switch mfg. co., bridgeport, ct. manufacturer markings are lightly incised on the backside of the push button plate. the four gang push button cover plate was salvaged from a chicago dining or ballroom believed to be located in the la salle hotel. only the backplate is available. measures approximately 8 x 4 1/2 inches.