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).
Note on the nil extra tool cost for bringing the 1st Chassis in 'M' Series into production.
| Identifier | ExFiles\Box 83\3\ scan0059 | |
| Date | 1st October 1937 guessed | |
| Extra Tool Cost Nil. Could be brought on to production at the 1st. Chassis in "M" Series (without scrap) | ||