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 an A.T. Speedometer, detailing mileage tests.
| Identifier | ExFiles\Box 50\4\ Scan308 | |
| Date | 27th September 1928 | |
| X4308. Small type dial ELECTRICAL EXPERIMENTAL RECORD SHEETS. x No 4308 A.T. Speedometer No B.919.742. 15/52 Date on. Location. Date off. REMARKS. Miles reading Start. Miles reading Finish. Miles covered. Total miles. 27-9-28 Lab 3-10-28 Tested see report E.F.C.2/T2.10.28 3-10-28 12 EX 16-11-28 " 382 2560 2178 2178 16-11-28 " 28-12-28 2560 4378 1810 3988 28-12-28 " 22-2-29 4378 6540 2162 6150 22-2-29 " 29-4-29 6540 8936 2396 8546 29-4-29 " 1-6-29 8936 10785 1799 10295 1-6-29 " 12-8-29 10785 14416 3631 13926 12-8-29 " 14-9-29 14416 17533 3117 17043 14-9-29 " Speedometer gone with car SP {Mr Spinney} 17533 | ||