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 drawing of a mechanical housing component with dimensions.
| Identifier | ExFiles\Box 170\1\ img005 | |
| Date | 14th January 1938 guessed | |
| 17 1/2 8 3/4 23 1/4 32 | ||