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).
List of vehicle improvements including the front dumb iron, battery ignition tower, and a non-rattling brake handle.
| Identifier | WestWitteringFiles\I\July1922\ Scan48 | |
| Date | 21th July 1922 guessed | |
| (2) (33) Front dumb iron with large rivets and single bolt or rivet at front. (34) Improvements to battery ignition tower. (35) Non rattling brake handle. The majority of these items were sent through some time ago, and we only mention them now by way of confirmation. R.{Sir Henry Royce} | ||