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 memorandum requesting an order for two types of Champion spark plugs.
| Identifier | ExFiles\Box 162\3\ img162 | |
| Date | 11th December 1939 | |
| Elec. 6000 To Les.{Ivan A. Leslie} c. to RM{William Robotham - Chief Engineer}/RC{R. Childs}/RB.{R. Bowen} Rm{William Robotham - Chief Engineer}/RC.{R. Childs}3/JH.11.12.39. re Sparking Plugs. Will you please order for our stock the following Champion plugs - 4 doz. N.10 type } O/N.52482. 4 doz. N.8 type } Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||