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).
Blueprint of a Phantom III brake countershaft, indicating where a stone got jammed and suggesting a guard.
| Identifier | ExFiles\Box 92\3\ scan0111 | |
| Date | 22th February 1937 guessed | |
| STONE JAMMED HERE. SUGGEST GUARD. PH III. BRAKE COUNTERSHAFT. 35 EX. CHATEAUROUX. | ||