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).
Requesting the supply of a one-and-a-half value ballast resistance.
| Identifier | ExFiles\Box 168a\5\ img033 | |
| Date | 7th January 1929 | |
| To Mr .Brock/Mr. Wolstenholme. X 7720 EFC./T7.1.29. Will you please supply one further one-and-a-half value ballast resistance to particulars given, to O/N.54733. Wire herewith. EFC. | ||