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 40/50 distribution box and cutout test.
| Identifier | ExFiles\Box 166\8\ img007 | |
| Date | 4th November 1931 guessed | |
| CONNECTIONS FOR R.R. 40/50 DISTRIBUTION BOX & CUTOUT TEST R A V B A F + - | ||