Blueprint showing a fracture on a front spring clip after a timed test run.
| Identifier | ExFiles\Box 16\7\ Scan141 | |
| Date | 11th January 1929 | |
| BROKE HERE TIME RUN 61 HRS 20 MINS FRONT SPRING CLIP Grealom ROLLS-ROYCE, LIMITED 11 JAN 1929 | ||
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).