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).
Sketch and notes regarding a Gear Box drive component's serrations and wear.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page160 | |
| Date | 10th December 1932 guessed | |
| Gear Box drive dug in approx .020" These serrations do not show any signs of wear. | ||