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).
The production schedule for the Phantom III four-port cylinder head.
| Identifier | ExFiles\Box 93\4\ scan0099 | |
| Date | 11th January 1937 | |
| 319 To BY.{R.W. Bailey - Chief Engineer} From RHC.{R. H. Coverley - Production Engineer} c. to E.{Mr Elliott - Chief Engineer} c. to Rm.{William Robotham - Chief Engineer} c. to HS.{Lord Ernest Hives - Chair} RHC.{R. H. Coverley - Production Engineer}2/MJ.11.1.37. PHANTOM 111 FOUR PORT CYLINDER HEAD. We are most anxious to ascertain exactly when the four port cylinder head for the Phantom 111 Chassis will be brought into Production. This information is essential in order that necessary arrangements can be made to commence manufacture as soon as possible and prevent over-production of the present type of cylinder head. It has been tentatively agreed with BY.{R.W. Bailey - Chief Engineer} (subject to Administration approval) to bring this modification on to the 26th. Chassis in "C" Series, this chassis being due for test early in april. Should this be ultimately agreed upon immediate steps must be taken to commence production. RHC.{R. H. Coverley - Production Engineer} [Signature] | ||