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).
Chart recording of an electrical test showing amperage over time, possibly for a battery.
| Identifier | ExFiles\Box 54\1\ Scan158 | |
| Date | 17th July 1924 | |
| 49 17-7-24 147 P&R RRII/1 103 lbs. 80 a.h. Average amperes = 6.63 Hours = 8.0 Ampere hours = 53.0 -5/2 1.80w MARK MEGGER | ||