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 receipt of three type BD11 batteries suitable for the 40/50 model.
| Identifier | ExFiles\Box 38\5\ Scan176 | |
| Date | 24th November 1921 | |
| X.3398. EFC/T24.11.21. X.3398 - P & R BATTERIES. We have now received three type BD{Mr Berend}11 batteries of size suitable for the 40/50. E.F.C. EFC. | ||