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).
Outline drawing of a tachometer component with a flexible lead.
| Identifier | ExFiles\Box 165\3\ img138 | |
| Date | 2nd October 1933 guessed | |
| 4 3/4" FLEXIBLE LEAD. OUTLINE TACHOMETER G | ||