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 diagrams for a voltmeter and its connections.
| Identifier | ExFiles\Box 59\1\ Scan225 | |
| Date | 7th October 1927 guessed | |
| To. Dyn. terminal C. To Earth From Dis. Box. terminal C From Dis. Box. terminal B Voltmeter To Dyn. terminal C. To Earth Voltmeter From dis box terminal B. From dis. box terminal C. | ||