Cost comparison of high tension cable from B.I. Neoprene and Johnson & Phillips.
| Identifier | ExFiles\Box 167\3\ img142 | |
| Date | 25th January 1939 | |
| -2- Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 8/JH.25.1.39. High tension cable for all cars. The cost of the B.I. Neoprene will be about half that of the Johnson & Phillips. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} | ||
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).