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' Brimol at 100 diameters magnification.
| Identifier | ExFiles\Box 120\1\ scan0348 | |
| Date | 20th June 1935 | |
| R.R. 403 (5m) (84259 20-6-35) J.H., Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A/316 MAGNIFICATION: 100 DIAMETERS. Spec. "C" Brimol M1080 | ||