Cover memo for the test specification of a 40/50 Switchbox.
| Identifier | ExFiles\Box 61b\3\ scan0317 | |
| Date | 15th June 1931 | |
| X6070 Ey. from Hs {Lord Ernest Hives - Chair} /CAP. c. Sft {Mr Swift} /Mr. Brock. Hs {Lord Ernest Hives - Chair} /CAP1/AM15.6.31. 40/50 SWITCHBOX. X.6070 X.6088 Herewith please receive Specification of Test for the above. Hs {Lord Ernest Hives - Chair} /CAP. Attached. | ||
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).