This is a vintage Auto Lamp accessory light. Fog / Driving / back up? lamp. Model BL49. Possably1940s or 50s? era. Has been tested on 6 volts and lights up. Appears to be in pretty good condition for its age. Has minimal pitting and two small dents in the ba ck. Will need some cleaning and polishing. Cool looking style. Hard to find. See pics for details. Item comes as is pictured. Thanks for looking.