Final 15:45 | time | 1. Otis Davis | USA | 44.9s | 2. Carl Kaufmann | GER | 44.9s | 3. Malcolm Spence | RSA | 45.5s | 4. Milkha Singh | IND | 45.6s | 5. Manfred Kinder | GER | 45.9s | 6. Earl Young | USA | 45.9s |
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| Venue: Stadio Olimpico, Roma. Capp.: 65,000. | -- competitors from -- nations. |
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Semi 1 | time | 1. Otis Davis | USA | 45.5s | 2. Mikha Singh | IND | 45.9s | 3. Manfred Kinder | GER | 46.0s | 4. Robbie Brightwell | GBR | 46.1s | 5. Gordon Day | SAF | 46.7s | 6. Kevan Gosper | AUS | 47.1s |
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Semi 2 | time | 1. Carl Kaufmann | GER | 45.7s | 2. Malcolm Spence | SAF | 45.8s | 3. Earl Young | USA | 46.1s | 4. Abdul Karim Amu | NIG | 46. s | 5. Malcolm Spence | ANT | 46.8s | 6. Jack Yerman | USA | 48.9s |
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Quarter 1 | time | 1. Carl Kaufmann | GER | 46.5s | 2. Mikha Singh | IND | 46.5s | 3. Malcolm Spence | ANT | 46.9s | 4. Terry Tobacco | CAN | 47.5s | 5. Edgar Davis | SAF | 48.0s | 6. Malcolm Yardley | GBR | 48.8s | -. Alf Petterson | SWE | DNS |
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Quarter 2 | time | 1. Jack Yerman | USA | 46.4s | 2. Kevan Gosper | AUS | 46.5s | 3. Manfred Kinder | GER | 46.7s | 4. James Wedderburn | ANT | 47.0s | 5. German Guenard Soltero | PUR | 47.2s | 6. John Wrighton | GBR | 48.0s |
Quarter 3 | time | 1. Earl Young | USA | 46.1s | 2. Robbie Brightwell | GBR | 46.2s | 3. Gordon Day | SAF | 46.3s | 4. Jochen Reske | GER | 47.3s | 5. Stanislaw Swatowski | POL | 47.4s | 6. Konstantin Grachev | URS | 47.6s | 7. Bartonjo Rotich | KEN | 47.8s |
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Quarter 4 | time | 1. Otis Davis | USA | 45.9s | 2. Malcolm Spence | SAF | 46.1s | 3. Abdul Karim Amu | NIG | 46.6s | 4. Jerzy Kowalski | POL | 46.7s | 5. Giuseppe Bommarito | ITA | 47.5s | 6. Barry Robinson | NZL | 48.3s | 7. Louis Declerck | BEL | 48.4s |
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Heats - Saturday 03.09 09:50 |
Heat 1 | time | 1. Manfred Kinder | GER | 46.7s | 2. Edgar Davis | SAF | 47.2s | 3. Malcolm Yardley | GBR | 47.3s | 4. Josef Trousil | CSV | 47.4s | 5. John Asare-Antwi | GHA | 47.7s | 6. Hirotada Hayase | JPN | 49.1s | 7. Habib Zareef Syed | AFG | 53.8s |
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Heat 2 | time | 1. Alf Pettersson | SWE | 48.3s | 2. Robbie Brightwell | GBR | 48.4s | 3. Konstantin Grachev | URS | 49.3s | 4. Felix Heuertz | LUX | 50.2s | -. G. Kerr | ANT | DNS | - N. Romero | VEN | DNS |
Heat 3 | time | 1. Carl Kaufmann | GER | 47.3s | 2. Barry Robinson | NZL | 47.6s | 3. Louis Declerck | BEL | 47.9s | 4. Anubes Ferraz Da Silva | BRA | 48.0s | 5. Csaba Csutoras | HUN | 48.2s | 6. Eugh Bullard | BAH | 51.1s |
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Heat 4 | time | 1. Malcolm Spence | SAF | 46.7s | 2. Kevan Gosper | AUS | 47.1s | 3. Terry Tobacco | CAN | 47.4s | 4. Gadi Ado | UGA | 49.0s | 5. Marcel Lambrechts | BEL | 49.5s | 6. Jorge Teran | MEX | 49.6s | 7. Brahim Karabi | TUN | 52.0s |
Heat 5 | time | 1. German Guenard Soltero | PUR | 47.3s | 2. Jerzy Kowalski | POL | 48.3s | 3. Giuseppe Bommarito | ITA | 48.6s | 4. Li Po Ting | TPE | 49.5s | 5. Clayton Glasgow | GUA | 50.7s | 6. George Johnson | LBR | 51.4s |
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Heat 6 | time | 1. Jack Yerman | USA | 47.2s | 2. Mikha Singh | IND | 47.6s | 3. Stanislaw Swatowski | POL | 48.1s | 4. Jegathesan Manikavasagam | MAL | 48.4s | 5. Ivan Rodriguez | PUR | 49.6s | 6. Claro Pellosis-Padilla | PHI | 51.4s |
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