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).
Laboratory report with two micrographs showing material structures at x300 magnification.
| Identifier | ExFiles\Box 96\1\ scan0362 | |
| Date | 19th December 1938 | |
| ROLLS-ROYCE LABORATORY REPORT: H1/EJV. 1/JM.{Mr Morley} 19.12.38. M.1756/1. x300. Cementite in the spheroidal condition. M.1756/2. x300. Pearlitic structure restored. | ||