Hand-drawn electrical schematic diagram for a dynamo or motor.
| Identifier | WestWitteringFiles\C\August1919\ Scan40 | |
| Date | 16th April 1919 | |
| R.R. 235 A (100 T) (S.F. 575, 16-4-19) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. 1a N A+ C R M+ M+7-C S A- R C M+7-C M- | ||
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).