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).
Wiring diagram for a Lucas Switchbox showing connections for lamps and a generator.
| Identifier | ExFiles\Box 61\2\ scan0290 | |
| Date | 24th January 1920 | |
| X. 2515. X. 3749 Connections of Lucas Switchbox with fuses in negative and control circuits II H HEAD, SIDE & TAIL LAMPS H H T S S H+T S+T MS A H S T + - 1 2 3 4 C GENERATOR E.575 24-1-20. | ||