Photograph of a Dobbie McInnes mechanical indicator or testing apparatus.
| Identifier | ExFiles\Box 25\3\ Scan101 | |
| Date | 16th April 1923 guessed | |
| DOBBIE McINNES GLASGOW | ||
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).