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 tracking the usage and mileage of a battery.
| Identifier | ExFiles\Box 168b\3\ img209 | |
| Date | 1st July 1929 | |
| X7535/P ELECTRICAL EXPERIMENTAL RECORD SHEETS. (Commencing on EF70032) P&RBDHII-5 Battery (196) F79640 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading Finish. | Miles covered. | Total Miles. X.No 7535P 3-12-28 | Received & charged | 10-12-28 | Guarantee no H/512480. 10-12-28 | 18EX | 22-5-29 22-5-29 | E.M.S. | 1-7-29 | No further record kept. | 762 | 17987 | 17225 | 17225 H.J. | ||