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).
Letter to A.C. Sphinx Plug Co. Ltd regarding the testing of their KD.7.A. type spark plugs.
| Identifier | ExFiles\Box 162\3\ img181 | |
| Date | 6th March 1940 | |
| RC.{R. Childs} Experimental Dept. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}2/MH.{M. Huckerby} 6th. March, 1940. A.C.Sphinx Plug Co. Ltd., Dunstable, BEDS. Dear Sirs, We thank you for your letter of the 28th. February. We notice in your sparking plug chart that you recommend KD.7.A. type plugs for our 1939 class car. We have ordered, under separate cover, a few of these plugs in order to prove their suitability. Yours faithfully, for ROLLS-ROYCE LTD. | ||