Pencil sketches of various small mechanical components including a lever and block.
| Identifier | ExFiles\Box 180\M6\ img013 | |
| Date | 1st November 1929 guessed | |
| Illegible text. | ||
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).