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).
Electrical experimental record sheet for an AT Speedometer, No E.185.785.
| Identifier | ExFiles\Box 59\2\ Scan098 | |
| Date | 20th April 1931 | |
| X 6051 X6051a ELECTRICAL EXPERIMENTAL RECORD SHEETS. rate:- XN4308 AT. Speedometer No E.185.785. 1/41 Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered | Total miles. 8-10-30 | Lab | 10-10-30 | Tested see report E7C-2/AD13.10.30. | 00081 | 00392 | 00311 | 00311 11-10-30 | 2. REX | 29-11-30 | | 00392 | 2700 | 2308 | 2619 29-11-30 | " | 2-1-31 | | 2700 | 3986 | 1286 | 3905 2-1-31 | " | | | 3986 | | | No further record kept GJ. 20-4-'31. | ||