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).
Record of drawing numbers for Tungsten Points obtained from the Drawing Office.
| Identifier | ExFiles\Box 35\6\ scan 209 | |
| Date | 9th November 1926 | |
| X2894 9.11.26. X. 2894. TUNGSTEN POINTS Drawing Nos. obtained from D.O. to-day D.51407/8. EFC. | ||