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).
Graph comparing the output in amperes of a Rolls-Royce (R.R.) dynamo versus a Lucas dynamo at different speeds.
| Identifier | ExFiles\Box 142\3\ scan0337 | |
| Date | 9th September 1937 guessed | |
| OUTPUT. (AMPERES) LUCAS R.R. DYNAMO SPEED. (R.P.M) ROAD SPEED. (M.P.H) | ||