Notification of a P & R HDE 13 battery being fitted to the Instruction School Car.
| Identifier | ExFiles\Box 38\5\ Scan108 | |
| Date | 4th January 1921 | |
| X3398 4.1.21. X.3398. P & R HDE 13 Battery. The above battery has been fitted to Instruction School Car. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).