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).
Requesting cars fitted with four-wheel brakes to have a red triangle at the back to warn traffic.
| Identifier | ExFiles\Box 73\3\ scan0279 | |
| Date | 19th February 1925 | |
| Exp. Dept. Prod.I.D. Will you kindly arrange that any cars which are being used at the Works, fitted with four wheel brakes, are fitted with a red triangle at the back, to indicate that the/cars are four wheel brake cars, with the object of course of warning traffic. BY.{R.W. Bailey - Chief Engineer} By | ||