From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Confirmation on the fitting and effectiveness of Perfect Circle oil seals on a rear axle.
| Identifier | ExFiles\Box 84\4\ scan0055 | |
| Date | 6th August 1935 | |
| To Hd.{Mr Hayward/Mr Huddy} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Kno2 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 7/KW. 6. 8. 35. Perfect Circle Oil Seals in the Rear Axle, to prevent oil leaking on to the Brakes. Will you please confirm that these oil seals have been fitted to the axle of B-35-AE - Hall's car. Will you also please confirm that these seals have proved effective, as far as we know, on cars to which they have been fitted. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||