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).
The order of a P & R RR.11 (40/50) battery for the Electrical Experimental Department.
| Identifier | ExFiles\Box 54\1\ Scan069 | |
| Date | 2nd December 1925 | |
| X4677P To Wd.{Mr Wood/Mr Whitehead} from EFC. EFC5/T2.12.25. RE 40/50 BATTERIES. Will you kindly order up for use in the Elec. Expl. Dept. 1 P & R RR.11 battery (40/50), to be delivered in a fully charged condition. EFC. | ||