On June 19, 2012, Frankel recorded what the Racing Post reported as an ‘extremely impressive’ 11-length victory over Excelebration in the Queen Anne Stakes at Royal Ascot and, in so doing, became the highest-rated horse in the history of Timeform, which first published ratings in ‘Racehorses of 1948’. As confirmed in ‘Racehorses of 2012’, Frankel was awarded a rating of 147, 2lb superior to Sea-Bird, who was beaten just once in an eight-race career in 1964 and 1965 and awarded a rating of 145 after winning all five starts as a three-year-old. Sea-Bird raced just once in Britain, effortlessly beating Meadow Court and twenty other rivals by two lengths in the Derby without coming off the bridle.
Later in 1965, Sea-Bird was sent off 6/5 favourite for the Prix de l’Arc de Triomphe at Longchamp, despite facing the strongest field of middle-distance talent ever assembled, including the hitherto unbeaten Prix du Jockey Club, or French Derby, winner Reliance. Despite sweating profusely in the preliminaries, Sea-Bird was travelling well in fifth place approaching the home straight and, thereafter, came clear of his rivals along with the eventual runner-up, Reliance. Sea-Bird veered alarmingly across the track in the last half a furlong or so, but still won by an official margin of six lengths, with Australian-born jockey Pat Glennon patting him down the neck in the closing stages.