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).
The dubious prospects of a new two-way press button switch, contrasting it with the satisfactory performance of the old switches.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan170 | |
| Date | 8th March 1929 guessed | |
| contd :- -2- We are dubious about the prospects of satisfactory operation of the new two-way press button switch. We hope to have another one of these (with improvements) for trial shortly. The old switches (two-way press button) have been entirely satisfactory, one on 9-EX (32,000 miles) and one on 14-EX (20,000 miles). EFC. | ||