Pencil sketch of a mechanical linkage or lever with a bolt through one end.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan102 | |
| Date | 1st May 1926 guessed | |
| ", | ||
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).