Wraith II clutch, referencing schedules for the disc.
| Identifier | ExFiles\Box 8\1\ 01-page32 | |
| Date | 19th January 1937 | |
| SECRET. LOM {Mr Lombard} 612 BY C. E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} Per. HPH. E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} P/HP.19.1.37. Wraith II Clutch. Be send herewith N.Sch.5008 showing the disc for the clutch to N.Sch.4398. E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).