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 'Millenite' at 100x magnification, part of specification no. 66.
| Identifier | ExFiles\Box 120\1\ scan0335 | |
| Date | 20th June 1935 | |
| R.R. 403 (5H) (84259 20-6-35) J.H., Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH NO. A/320 MAGNIFICATION: 100 DIAMETERS. 'Millenite' Spec. No. 66 M1081 | ||