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 Salter's spring balance scale being used in a test rig with a chain hoist.
| Identifier | ExFiles\Box 92\4\ scan0045 | |
| Date | 22th December 1934 guessed | |
| SALTER'S. IMPROVED SPRING BALANCE. WARRANTED. TO WEIGH 1200 LB. BY 2 LBS. 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200. | ||