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 comparison note between a standard manifold and a malleable iron alternative, showing a saving.
| Identifier | ExFiles\Box 104\2\ scan0245 | |
| Date | 7th May 1970 | |
| sh'scd'y 7.5.70 SBS 250% 1/8" thick R.R. manifold E60873. Factory Cost. 27/- & Castings only 3/16" Malleable Iron 17/- Saving 10/- 585 - 12.857 | ||