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 parts for experimental and production chassis, including the Wraith Type Gearbox.
| Identifier | ExFiles\Box 161a\3\ scan0040 | |
| Date | 27th January 1939 | |
| - 7 - Sec.No. | Title. | LOP. No. | 1st. 50 Exp. Production Chassis. | 250 Production Chassis. | Wraith Type Gearbox. ---|---|---|---|---|--- 5020 | Spring Drive. | EB.4275 14.12.38. | To LOP. | To LOP. | No change. 5030 | Connecting Rods. | EB.4192 14.12.38. | To LOP. | To LOP. | No change. 5040 | Pistons | EB.4317 10.1.39. | Hold uppending revision of skirt diameter. | | No change. 5050 | Cylinder Head. | EB.4317 10.1.39. | To LOP. | To LOP. | No change. 5060 | Valves & Fittings. | EB.4310 15.12.38. | To LOP. | To LOP. | No change 5070 | Inlet Pipes. | EB.4233 15.12.38. | Inlet pipes to suit carburetter with HAND mixture control. No thermostat switch, otherwise to LOP. | As 50 sets. | No change 5080 | Carburetter | | Hand Mixture Control. Spec'n required from Rm.{William Robotham - Chief Engineer} | | No change 5082 | Carb.Air Silencer. | EB.4231 22.12.38. | To LOP. | To L.O.P. Type of dash fitted will affect choice of air silencer. | No CHANGE. | ||