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).
Mostly blank cover sheet overlying a blue document.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan80 | |
| Date | 5th May 1925 guessed | |
| -4C | ||