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 British Carbon's brushes.
| Identifier | ExFiles\Box 166\1\ img132 | |
| Date | 1st January 1931 | |
| X.6093. 1.1.31. For previous correspondence in connection with British Carbon's brushes see Roy{Sir Henry Royce}/Msl/P12.9.30 in X.8673. | ||