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).
Mileage report for Eska Tungsten Points fitted to two vehicles.
| Identifier | ExFiles\Box 35\6\ scan 122 | |
| Date | 25th April 1924 | |
| X2894 25.4.24. EFC. X. 2894. ESKA TUNGSTEN POINTS. Tungsten points AQ fitted to 7GII have run up to date 8,863 miles. Tungsten points AR fitted to 3GII have run up to date 1,957 miles. CAP. | ||