This is the progression of world record improvements of the 300 metres hurdles M60 division of Masters athletics.
Key
HandAutoAthleteNationalityBirthdateLocationDate42.31 Guido Müller 22.12.1938 Gateshead 01.08.1999 43.49Jack Greenwood 05.02.1926 Eugene 03.08.1989 46.31Jack Greenwood 05.02.1926 Uniondale 19.07.1986
References
Masters Athletics 300 m hurdles list