Specification table detailing part changes across different production chassis and gearbox types.
| Identifier | ExFiles\Box 161a\3\ scan0041 | |
| Date | 27th January 1939 | |
| - 8 - BY {R.W. Bailey - Chief Engineer} /NS. {Norman Scott} 1/G.27.1.39. Sec.No. | Title. | LOP.No. | 1st. 50 Exp. Production Chassis. | 250 Production Chassis. | Wraith Type Gearbox. --- | --- | --- | --- | --- | --- 5090 | Camshaft & Brgs. | EB.4276 14.12.38. | Light type cam wheel, otherwise to LOP. | As 50 sets. | No change. 5100 | Dyno. & W.P. Drive. | | Rubber coupling. Les. {Ivan A. Leslie} to get costs of alternative to Metalastik. | | no change. 5101 | Water Pump Drive. | EW.1526 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5120 | Ign.Governor & Drive. | EW.1706 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change, 5160 | Water Pump. | EW.1988 13.12.38. | As Wraith, to LOP. | As Wraith to LOP. | No change. 5170 | Oil Pump & Drive. | EW.973 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5180 | Wheelcase. | EW.1491 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5190 | Water Connections. | | Water Connections to suit radiator as fitted to 9.B.5. | As 50 sets. | No change. | ||
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).