Prix Jean Prat metres. For a period it was held in April, and it served as a trial for the Prix du Jockey Club. Both Prix Biennal races were renamed the Prix Jean Prat in 1940. This was in memory of Jean Prat (1847–1940), a successful racehorse owner and breeder. The version for three-year-olds was switched to late May or early June in 1961. It was shortened to 1,850 metres in 1962. It was transferred to Chantilly and cut to 1,800 metres in 1967. The present system of race grading was introduced in 1971, and for several years the event held Group 2
George Moore (jockey) Del Mar Racetrack. In 1957 and 1958 George Moore won the Jockeys' Premiership at Sydney then in 1959 accepted an offer to ride in Europe for trainer/owner Alec Head of Haras du Quesnay and another major owner, Prince Aly Khan. There, he won the Prix du Jockey Club and the Prix de l'Arc de Triomphe, as well as a British Classic Race, the 2,000 Guineas. Returning to Sydney, Moore continued to win Jockeys' Premierships and in 1967 returned for a time to compete in Europe for trainer Noel Murless where he won the first three 1967 British Classics, the 1,000