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).
Cost estimate and production details for standardising a feature on three chassis types.
| Identifier | ExFiles\Box 168a\3\ img338 | |
| Date | 22th January 1937 guessed | |
| Estimated cost of new tools approximately £13. 0. 0. assuming this feature is standardised on all/three types of chassis. Could be brought on to production at the 1st. chassis in "PP" series without scrap. | ||