original early 20th century salvaged chicago wall mount vintage industrial single light "alabax" sconce manufactured by the pass & seymour inc., syracuse, ny. standard 2 1/4 inch fitter with intact threaded set screws. pull-chain socket in working condition. streamlined style art deco white opalescent glass shade original. plug receptacle (for electrical appliances) found below the socket housing. free from breaks or cracks.