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).
List of requirements for vehicle fittings including lamps, radio, and a compass.
| Identifier | ExFiles\Box 167\1\ img092 | |
| Date | 23th January 1937 guessed | |
| .2. Map Reading lamp on dashboard. L & R tail and brake lamps. Radio and aerial to be fitted (This will be supplied). Small compass - to be left in abeyance for time being. | ||