Concerning the Spring Drive and Crankshaft Damper for Wraith III, B.III and B.50 models.
| Identifier | ExFiles\Box 99\1\ scan0108 | |
| Date | 4th August 1938 | |
| H14. Rm. {William Robotham - Chief Engineer} Da {Bernard Day - Chassis Design} 6/G. 4.8.38 Wraith III, B.III + B.50 Spring Drive + Crankshaft Damper file 1116. | ||
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).