Duke’s Racing Achievements

TT and Manx GP wins

1949: Senior Clubman’stt and Senior Manx GP (Norton) 1950: Seniortt (Norton) 1951: Junior and Seniortt (Norton) 1952: Juniortt (Norton) 1955: Senior (Gilera)

Grand Prix World Championships

1951: 350cc and 500cc world titles (Norton) 1952: 350cc world title (Norton) 1953: 500cc world title (Gilera) 1954: 500cc world title (Gilera) 1955: 500cc world title (Gilera)