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).
Point regarding future checks for the required depth of case on parts.
| Identifier | ExFiles\Box 153\1\ scan0269 | |
| Date | 19th April 1939 guessed | |
| 3. in the future what to look for where this depth of case is required on this or other parts. | ||