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).
Continued memorandum comparing the quality and cost of Firth springs against American and Lemoine springs.
| Identifier | ExFiles\Box 52\2\ Scan175 | |
| Date | 29th September 1928 guessed | |
| contd :- -2- spring or American spring is due to better the superior finish of the surface, or the workmanship, we ought to insist that Firth springs are at least equal, especially as I understand the cost to us of the Firth springs is greater than the Lemoine springs. R. {Sir Henry Royce} | ||