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).
Photograph of a portable recording instrument manufactured by the Cambridge Instrument Co. Ltd.
| Identifier | ExFiles\Box 138\2\ scan0068 | |
| Date | 19th January 1937 guessed | |
| FIG. 1 CAMBRIDGE INSTRUMENT Co. LTD. LONDON AND CAMBRIDGE C 207268 British Patent No 162510 START STOP SPEED PULL INCH M/M 0 25 | ||