---

Automatic Timing
46" 78      Kevin Young, USA, 06 Aug 1992, Barcelona
47" 02      Edwin Moses, USA, 31 Aug 1983, Koblenz
47" 13      Edwin Moses, USA, 03 Jul 1980, Milan
47" 45      Edwin Moses, USA, 11 Jun 1977, Westwood
47" 64      Edwin Moses, USA, 25 Jul 1976, Montreal
47" 82      John Akii-Bua, UGA, 02 Sep 1972, Munich
48" 12      David Hemery, GBR, 15 Oct 1968, Mexico City

Hand Timing
48" 6+      Geoffrey Vanderstock, USA, 11 Sep 1968, Echo Summit
49" 1+      Warren Cawley, USA, 13 Sep 1964, Los Angeles
49" 2+      Salvatore Morale, ITA, 14 Sep 1962, Belgrad
49" 2+      Glenn Davis, USA, 06 Aug 1958, Budapest
49" 5+      Glenn Davis, USA, 29 Jun 1956, Los Angeles
50" 4+      Yuriy Lituyev, URS, 20 Sep 1953, Budapest
50" 6+      Glenn Hardin, USA, 26 Jul 1934, Stockholm
51" 8+      Glenn Hardin, USA, 30 Jun 1934, Milwaukee
52" 0+      Glenn Hardin, USA, 01 Aug 1932, Los Angeles
52" 0+      Morgan Taylor, USA, 04 Jul 1928, Philadelphia
52" 6+      John Gibson, USA, 02 Jul 1927, Lincoln
53" 8+      Sten Pettersson, SWE, 04 Oct 1925, Paris
54" 0+      Frank Loomis, USA, 16 Aug 1920, Antwerp
54" 2+      John Norton, USA, 26 Jun 1920, Pasadena
55" 0+      Charles Bacon, USA, 22 Jul 1908, London

B. PERFORMANCES STATISTICALLY VALID, BUT UNRATIFIED FOR VARIOUS REASONS

Hand Timing
53.4y August Desch, USA, 05 Jul 21, Pasadena
53.2y Chan Coulter, USA , 31 May 24, Iowa City
52.1   Ivan Riley, USA, 31 May 24, Ann Arbor
51.7   Robert Tisdall, IRL, 01 Aug 32, Los Angeles

Electronic Timing
51.67  Robert Tisdall, IRL, 01 Aug 32, Los Angeles
51.06  Charles Moore, USA, 21 Jul 52, Helsinki
50.29  Glenn Davis, USA, 24 Nov 56, Melbourne
49.51  Glenn Davis, USA, 02 Sep 60, Rome
49.15  Rainer Schubert, FRG, 13 Oct 68, Mexico City
49.14  Roberto Frinolli,  ITA 14 Oct 68, Mexico City

C. UNOFFICIAL PROGRESSION BEFORE IAAF

64.0y  A. Pearc, IRL, 30 Jul 1860, Dublin
63.3y  F. Smith, IRL, 30 May 1866, Dublin
62.3y  R.R. Jones, GBR, 06 Aug 1870, Burnley
61.0y  C. Cranswick, GBR, 27 Jul 1871, Malton
60.8y  R.C. Miller, IRL, 10 Jun 1873, Dublin
60.8y  Sam Widdowsnn, GBR, 02 aug 1873, Leeds
59.8y  Samuel Morris, GBR, 05 Jul 1886, Radcliffe
59.0y  Samuel Morris, GBR, 07 Aug 1886, Knutsford
57.2y  Godfrey Shaw, GBR, 12 Aug 1891, Douglas
56.4y  Jerome Buck, USA, 19 Sep 1896, New York
55.8    Charles Bacon, USA, 06 Jul 1908, Philadelphia

D. BEST LOW ALTITUDE MARKS SET WHILE A HIGH ALTITUDE WORLD RECORD (IN PARENTHESES) WAS STANDING

49" 1 Vyacheslav Skomorokhov (48.1), URS, 19 Aug 69, Kiev
48" 6 Jean-Claude Nallet (48.1) FRA, 08 Jul 70, Colombes
48" 4 Ralph Mann (48.1) USA, 02 Jul 72, Eugene