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).
From EFC to Mr. Hall regarding the sending of two miniature tumbler type switches.
| Identifier | ExFiles\Box 38\3\ Scan149 | |
| Date | 13th March 1919 | |
| To Mr. Hall from EFC. X.3362 EFC2/T13.3.19. 13th March 1919. X.3424 X.3362. I am sending you herewith two more Miniature Tumler type switches. We shall be glad if you will treat these in the same way as those recently treated. These two will complete the set. EFC. | ||