1955-1956 Chevrolet Bel Air Wonder Bar® RadioThe Wonder Bar I replaces the factory Wonder Bar radios introduced by GM in the late 1940s. The original Wonder Bar was the first ever radio to have an auto seek function. The RetroSound Wonder Bar I fits the 1955 1956 Chevrolet Bel Air and maintains the original look of the original with an authentic seek bar, replica knobs, and classic push buttons.