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 further correspondence regarding the 20 HP. RR. dynamo.
| Identifier | ExFiles\Box 51\1\ Scan422 | |
| Date | 1st July 1930 guessed | |
| X.4383. For further correspondence re 20 HP. RR. dynamo, see X.5660. (Gos.III.) EFC. {E. Fowler Clarke - Electrical Engineer} | ||