Have an original truck radio AD I think , plate on the case says model 986087 ca49 serial 61759 has a date line nothing on there. connected to 6 volt charger, no knobs but turned the on stem face lit up and hums like I remember 70 years or more years ago. looks clean inside,rectanguler buttons work says chevrolet on the face,single power wire with threaded bakelite fuse holder on the wire. Has a coax hole like a mid fifties car. Any ideas ?? Not gonna do any more to it till I hear more. mounting nuts and knobs are missing but will look one place for them.