Masters M55 400 metres hurdles world record progression explained

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

Key:

Hand	Auto	Athlete	Nationality	Birthdate	Location	Date
	57.73	Getulio Echeandia		15.05.1964	Ames	17.07.2019
	58.92	Guido Müller		22.12.1938		16.07.1995
	59.85			05.02.1926		27.08.1983
	1:02.28	Andre Findelli		18.05.1923	Viareggio	10.09.1978
1:03.6		Alfred Guidet		16.03.1918		24.06.1973

References

Masters Athletics 400 m hurdles list