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).
Photograph of a dynamometer and pulley system testing a series of levers.
| Identifier | ExFiles\Box 102\3\ scan0159 | |
| Date | 8th January 1936 guessed | |
| SALTER'S IMPROVED SPRING BALANCE 100 200 300 400 500 600 700 800 900 1000 1100 1200 836/26 | ||