Crazy late 1930s-1940s Thexton ECON-O-LITE. It's a cool little "shift light" that was marketed as a "save gas" product for cars and trucks. Never used, still in original box, with instructions. Hooks to signal wire and vacuum, and has a light bulb with red jewel lens. Haven't seen many and never unused. $ 50.00 shipped U.S. Hit me up for more info... Thanks