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).
Private request to obtain two 40 volt W.J. type H.T. battery assemblies from The Chloride Electrical Storage Co.
| Identifier | ExFiles\Box 63\1\ scan0199 | |
| Date | 7th June 1929 | |
| X3035. Roy.{Sir Henry Royce} from EFC. EFC2/AD7.6.29. Will you please obtain for me privately, from The Chloride Electrical Storage Co. Two 40 volt Assemblies (making 80 volts in all) of W.J. type, 10 volt H.T. battery units in fully charged condition. EFC. | ||