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).
Notification for a new Test Specification for Wraith III 'D' Series speedometers.
| Identifier | ExFiles\Box 165\2\ img202 | |
| Date | 15th June 1939 | |
| Rm{William Robotham - Chief Engineer}/RC.{R. Childs} BY/RD.1/B.15.6.39. WRAITH III SPEEDOMETERS : "D" SERIES - 100 SETS. Owing to the decision to reduce the "flatter" on all our Speedometer Dials, it is necessary to issue a new Test Specification as attached hereto. Specification EL8/9. BY/RD. | ||