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).
Reference note pointing to previous correspondence regarding 40/50 Production Tests.
| Identifier | ExFiles\Box 70\4\ scan0002 | |
| Date | 23th January 1925 guessed | |
| X. 8781 For previous correspondence see X.1627 - 40/50 Production Tests. EFC. | ||