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).
The change in finish for Bentley sparking plugs to cadmium plated.
| Identifier | ExFiles\Box 58\2\ Scan278 | |
| Date | 14th January 1936 | |
| G/MT. From Hs{Lord Ernest Hives - Chair}/Wst. V6000 Hs{Lord Ernest Hives - Chair}/Wst.5/MA.14.1.36. Will you please note that Bentley sparking plugs will eventually be cadmium plated instead of a blue finish and plugs should not therefore be queried when they come through with a cadmium finish. Hs{Lord Ernest Hives - Chair}/Wst. | ||