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).
Estimated cost of new tools included under Bentley Standardisation Sheet X. No. 251.
| Identifier | ExFiles\Box 105\4\ scan0195 | |
| Date | 10th March 1937 guessed | |
| STANDARDISATION PARTS Estimated cost of new tools included under Bentley Standardisation Sheet X. No. 251. Could be brought on to production at the 1st chassis in R2 Series (without scrap) 509./ | ||