This is the progression of world record improvements of the 400 metres M55 division of Masters athletics.

Key

  Incomplete information   Pending

Hand	Auto	Athlete	Nationality	Birthdate	Location	Date
	52.24	Charles Allie	United States	20.08.1947	Carolina	12.07.2003
	52.52	Ralph Romain	Trinidad and Tobago	20.07.1932	Alexandria	22.07.1990
	53.81	Berthold Neumann	Germany	19.12.1930	Radolfzell	06.09.1986
	54.56	Rudolph Valentine	United States	12.07.1923	Eagle Rock	09.06.1979
55.9		Charles Beaudry	United States	04.09.1918		18.08.1974

Masters Athletics 400 m list