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).
Cutaway photograph showing the internal gears of a differential assembly.
| Identifier | ExFiles\Box 124\5\ scan0058 | |
| Date | 29th February 1932 guessed | |
| ", | ||