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).
Cross-sectional diagrams of a mechanical assembly featuring a pendulum lever.
| Identifier | ExFiles\Box 108\2\ scan0136 | |
| Date | 2nd September 1938 guessed | |
| A B C D E F G H J PENDULUM LEVER | ||