1958 Buick Limited Riviera coupe
There are three air conditioning outlets on the dashboard. The chrome knob below the a/c outlet controls the radio's front/rear speaker fader. The accessory knob sets the optional "Speedminder," the red lamp illuminates when the parking brake is set. The vent knob allows a powerful stream of outside air if desired. There is a toggle switch on the underside of the panel below the brake warning lamp which operates the optional power antenna. The headlamp switch has a cone-shaped rubber tip.