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| John Duff | |||||||
|---|---|---|---|---|---|---|---|
 Duff (left) with Frank Clement at Le Mans in 1924 | |||||||
| Born | John Francis Duff January 17, 1895 Jiujiang, Jiangxi, China | ||||||
| Died | January 9, 1958 (aged 62) Epping Forest, England, U.K. | ||||||
| Championship titles | |||||||
| Major victories 24 Hours of Le Mans (1924) | |||||||
| Champ Car career | |||||||
| 3 races run over 1 year | |||||||
| Best finish | 17th (1926) | ||||||
| First race | 1926 Indianapolis 500 (Indianapolis) | ||||||
| Last race | 1926 Independence Day Classic (Rockingham Park) | ||||||
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| 24 Hours of Le Mans career | |||||||
| Years | 1923–1925 | ||||||
| Teams | Bentley, privateer | ||||||
| Best finish | 1st (1924) | ||||||
| Class wins | 1 (1924) | ||||||
John Francis Duff (January 17, 1895 – January 8, 1958) was a Canadian racing driver. He is best known for winning the 1924 24 Hours of Le Mans.