This is the progression of world record improvements of the 400 metres M70 division of Masters athletics.
Key
HandAutoAthleteNationalityBirthdateAgeLocationDate57.26Charles Allie20 August 1947Málaga11 September 2018 59.34Guido Müller22 December 1938Lahti28 July 20091:00.77Hugh Coogan15 August 1935Nathan1 April 20061:01.01Ralph Romain20 July 1932Carolina12 July 20031:01.10Jim Selby18 July 1928La Jolla19 June 19991:01.29Wilhelm Selzer7 May 1927Schweinfurt15 August 19971:01.71Rudolf Ahrenkiel16 July 1920Herning24 July 19931:02.2John Alexander6 September 191924 September 19891:04.6 Josiah Packard15 December 1903Gothenburg10 August 1977
References
Masters Athletics 400 m list