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).
Hand-drawn wiring diagram for a distribution box and cutout test.
| Identifier | ExFiles\Box 60\2\ Scan006 | |
| Date | 6th October 1931 guessed | |
| CONNECTIONS FOR RR UN/50 DISTRIBUTION BOX & CUTOUT TEST. R A U O V B A + - | ||