Two wiring diagrams for a vehicle's dynamo charging system, labelled Fig. 1 and Fig. 2.
| Identifier | WestWitteringFiles\E\August1920\ Scan17 | |
| Date | 25th August 1920 | |
| Switch Main Fuse Field Fuse Cut-out Dynamo FIG. 1 Main Fuse Switch Field Fuse Cut-out FIG 2. E7C 25.8.20. R. {Sir Henry Royce} R. {Sir Henry Royce} 285A (100 T) (S. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 643, 19-2-20) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2618 | ||
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).