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).
New gearbox specification for B.III and B.50 chassis.
| Identifier | ExFiles\Box 98\4\ scan0014 | |
| Date | 7th September 1938 | |
| 400d. Guy. By/Grl. 2/E.{Mr Elliott - Chief Engineer} 7.9.38 B.III + B.50 Chassis. New Gearbox specification see file 1153. | ||