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).
Cross-reference note for correspondence regarding the 20 HP starter motor.
| Identifier | ExFiles\Box 35\4\ scan 157 | |
| Date | 1st December 1925 guessed | |
| X.4384. For further correspondence in connection with 20 HP. starter motor, see X.5620. EFC. | ||