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).
Blueprint of a mechanical component with dimensions and load forces indicated.
| Identifier | ExFiles\Box 137\4\ scan0406 | |
| Date | 19th December 1931 guessed | |
| 1/2 lb 2" 7" 1/2 lb OK | ||