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).
The condition of Dynamo D and E6Z brushes after a 10,000-mile test run on a car.
| Identifier | ExFiles\Box 50\5\ Scan376 | |
| Date | 30th September 1925 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC. Order No.: AC. 59. Customer's No.: X 4610. 57 Dynamos D on 7.G.I. E6Z brushes. This machine has now completed 10,000 miles running on the car. The main brushes are in good condition, being very little worn, and fairly well polished. They are sliding freely in the holders. The commutator is smooth and of uniform colour. Signed: E.A.A. | ||