This is the progression of world record improvements of the 400 metres M65 division of Masters athletics.
Key
HandAutoAthleteNationalityBirthdateAgeLocationDateRef54.92 B. John Wright15 June 1959Toruń29 March 202656.28Charles Allie20 August 1947Falls Church1 September 201256.37Guido Müller22 December 1938Hof13 June 200457.27Ralph Romain20 July 1932Durban25 July 199757.52Berthold Neumann19 December 1930Malmö22 July 199657.97Earl Fee22 March 1929Buffalo22 July 199558.52Jim Law192665Syracuse27 June 19911:01.15Arne Pettersson24 March 1923Gothenburg3 September 1988
References
Masters Athletics 400 m list