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).
Note regarding armatures for 20 HP dynamos to achieve higher output.
| Identifier | ExFiles\Box 68\4\ scan0244 | |
| Date | 8th May 1925 | |
| 5663 RR 68 (250T) (DB{Donald Bastow - Suspensions} 925 8-5-25) J.H.D. armature, 20 HP. Dynamos to give higher output. | ||