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).
Specification sheet detailing the colours of various single core braided cables.
| Identifier | ExFiles\Box 45\3\ Scan188 | |
| Date | 23th August 1922 guessed | |
| -2- 40/36's Single core cable braided. (Contd) Description of Cable. Colour. Head-lamp Distribution Box to Switchbox (head lamp) White or neutral. " " " (side & tail) Green. " " " (Dynamo field) Black & White speckled " " " (Ignition) Blue. Ballast resistance to Dist.Box. Blue. Coil to ballast resistance. Blue. Coil to Distributor (Ignition). Blue. Body lighting (Use 23/36 same as Horn). Orange. Gauge lamp. Blue. Distribution box to switchbox (body light) Orange. (Use 23/36 same as horn). | ||