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).
Diagrams illustrating different configurations for 40/50 Sandwich Batteries.
| Identifier | ExFiles\Box 54\2\ Scan157 | |
| Date | 17th June 1925 | |
| X.4617E 17.6.25. 40/50 SANDWICH BATTERIES. No. Label. BATTERY. Case. 154. S1. P 155. S2. E 156. S3. P 157. S4. E | ||