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).
Experimental record sheet for large diameter tungsten points.
| Identifier | ExFiles\Box 35\6\ scan 169 | |
| Date | 17th May 1926 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 2894 Large Diameter Tungsten points. Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered. | Total miles 25-1-26 | 10GIII | | Fitted to distributor for 10GIII. | 1644 | | | 17-5-26 | lab. | | 10,000 mile test in France Changed after 7500 mls. Condition V.{VIENNA} Fair. | | 9180 | 7536 | 7536 X 2894 | ||