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 of Spec 'C' Brimal at 100x magnification.
| Identifier | ExFiles\Box 120\1\ scan0349 | |
| Date | 20th June 1935 | |
| R.R. 403 (SH) (S4259 20-6-35) J.H., Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH NO. A1, 317 MAGNIFICATION: 100 DIAMETERS. Spec. 'C,' Brimal m1080 | ||