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).
Cover note regarding the brush and commutator system for 20/25 dynamos.
| Identifier | ExFiles\Box 165\6\ img001 | |
| Date | 29th September 1924 guessed | |
| 6065 20/25 dynamos. brush & commutator system. | ||