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).
Cross-reference for further information on the electrical portion of the 40/50 Instruction Book.
| Identifier | ExFiles\Box 26\2\ Scan422 | |
| Date | 31th December 1930 | |
| X.7782. 31.12.30. For further matter relating to Electrical portion of 40/50 Instruction Book see X.6086. | ||