1946-1958 Cadillac dimmer foot switch, fits all cars WITHOUT Guidematic. 

 Cadillac Model Years

 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958

 Cadillac Part Number

 1997008

Cadillac Group Number

 2.459