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 Bentley Overdrive Gearbox for the 'M' Series.
| Identifier | ExFiles\Box 86\4\ scan0153 | |
| Date | 27th November 1937 | |
| By/Mtn. from Rm.{William Robotham - Chief Engineer} 228 Rm{William Robotham - Chief Engineer}1/R.27.11.37. BENTLEY - OVERDRIVE GEARBOX. With reference to By/Mtn30/N.25.11.37., we understand that this overdrive gearbox has been instructed for 'M' Series, for which casting in the Works does not begin until January 9th. Obviously, drilling of the casting need not be instructed until they have some castings to drill. Rm.{William Robotham - Chief Engineer} | ||