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).
Drawing of an experimental 14mm plug assembly.
| Identifier | ExFiles\Box 163\5\ img040 | |
| Date | 15th June 1936 | |
| SIGN WAS NO. DATE BY APP. CONFIDENTIAL A.C. SPHINX SPARKING PLUG CO. LTD. DUNSTABLE. BEDS. ENGLAND. X 410 DRAWN: BP TRACED: CHECKED: APPROVED: 8 INSULATION MAT. SPEC.: FINISH: NAME: EXP. 14 m/m PLUG ASSEMBLY USED ON: SCALE: 1-1 DATE: 15-6-36 MATERIAL: WT. PR.{Percy H. Rose} M: ROLLS DRAWN FROM A.C.S. 981-2,000-8-35 | ||