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).
To Mr. Clark regarding the acceptance of a special spark coil that has been rewound.
| Identifier | ExFiles\Box 45\4\ Scan162 | |
| Date | 7th May 1923 | |
| Mr. Clark. X.4079 7.5.23. X. 4079 - SPECIAL COIL. Please accept 1 spark coil new type C2 This coil has been rewound throughout with new quality paper now O.K. 4TG3 W. Gamble. | ||