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).
Request to supply two ballast resistances of the latest type for chassis number 54733.
| Identifier | ExFiles\Box 168a\5\ img040 | |
| Date | 13th February 1929 | |
| To Mr. Brock. X7720 EFC7/T13.2.29. Will you please supply us to C/N.54733 with two ballast resistances of the latest (1½) type. 35 inches of 32 S.W.G. wire. We hand you herewith wire bobbin for these which please return with ballasts. EFC. | ||