| Keystone | |
|---|---|
&sq=Qlik&lang=&file=File:Keystone_II.jpg) Keystone in 1906. | |
| Sire | Persimmon |
| Grandsire | St. Simon |
| Dam | Lock and Key |
| Damsire | Janissary |
| Sex | Mare |
| Foaled | 1903[1] |
| Country | United Kingdom |
| Colour | Bay |
| Breeder | Frederick Stanley, 16th Earl of Derby |
| Owner | Lord Derby |
| Trainer | George Lambton |
| Record | 9: 5-1-0 (incomplete) |
| Earnings | £12,832 (1906) |
| Major wins | |
| Oaks Stakes (1906) Coronation Stakes (1906) | |
| Awards | |
| Biggest money-winner in England (1906) | |
Keystone (also known as Keystone II, 1903 – 1929) was a British Thoroughbred racehorse and broodmare. Having suffered from ill-health as a juvenile she recorded an emphatic win in the Epsom Oaks on her second racecourse appearance. She went on to win the Coronation Stakes and three other races as well as finishing second in the Jockey Club Stakes and a possibly unlucky fourth in the St Leger. She failed to win in the following year and was retired from racing. As a broodmare she produced the St Leger winner Keysoe and was the female-line ancestor of Display and Ballymoss.
- ^ "Keystone pedigree". Equineline.