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).
Necessity and aesthetic impact of a green lamp switch on grouped instrument panels.
| Identifier | ExFiles\Box 60\3\ Scan116 | |
| Date | 10th May 1929 | |
| X4040. EFC. BY/RD9/N.10.5.29. Re: Green Lamp Switch. Referring to our conversation a day or two ago when you mentioned to me that the green lamp switch was definitely of no value, I would draw your attention to the fact that this green lamp unit has been allowed for on all our latest schemes of grouped instruments, and I suggest that it would be advisable for you to make known the fact the green lamp will be of no use, as this will entirely upset the symmetry of the grouped instrument patch. BY/RD [Stamp: RECEIVED 1929] | ||