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).
Internal request to order three small Exide cells for a portable valve rectifier.
| Identifier | ExFiles\Box 63\1\ scan0169 | |
| Date | 12th January 1927 | |
| X3035 To Wd.{Mr Wood/Mr Whitehead} from EFC. EFC2/T12.1.27. For our portable valve rectifier for high voltage D.C. tests and chronograph operation, we require three small Exide cells of their unspillable type MP2. List price 11/- each. We should be pleased if you would put these on order. EFC. | ||