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 testing the distribution box and cutout for a 40/50 model.
| Identifier | ExFiles\Box 60\2\ Scan028 | |
| Date | 23th January 1931 guessed | |
| CONNECTIONS FOR RR 40/50 DISTRIBUTION-BOX & CUTOUT TEST R A V B A F + - | ||