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).
Photomicrograph showing a close-up of a fractured metal component with an arrow indicating a feature.
| Identifier | ExFiles\Box 95\3\ scan0174 | |
| Date | 20th June 1935 | |
| R.R. 403 (5H) (84259 20-6-35) J.H., Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH NO. A/L 331 MAGNIFICATION: 3 DIAMETERS. | ||