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).
Specification table detailing component changes for experimental and production chassis models.
| Identifier | ExFiles\Box 161a\3\ scan0042 | |
| Date | 27th January 1939 | |
| - 9 - BY/NS.{Norman Scott}1/G.27.1.39 Sec. No. | Title. | LOP. No. | 1st. 50 Exp. Production Chassis. | 250 Production Chassis. | Wraith Type Gearbox. ---|---|---|---|---|--- 5200 | Oil Fittings. Petrol Fittings. | | To suit Carburetters. To suit General Oil Filter. | | No change. 5201 | Oil Filler. | | Filler casting may be altered by exhaust system. | | 5203 | Oil Filter. | EW.1417 13.12.38. | As Wraith, to LOP. | As Wraith to LOP. | No change. 5204 | Oil Level Indicator. | EW.1616 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5205 | Oil Relief Valves. | EW.1470 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5210 | Wire Fittings. | EW.1288 13.12.38. | As Wraith to LOP. | As Wraith to LOP. | No change. 5220 | Fan | EB.4333 14.12.38. | To LOP. | To LOP. | No change. 5230 | Exhaust Fittings. | | Design required in accordance with Experimental Sch. | | | ||