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).
Order for over-riding control valve springs for the 20/25 controllable dampers.
| Identifier | ExFiles\Box 105\3\ scan0345 | |
| Date | 23th March 1934 | |
| Roy{Sir Henry Royce}/Ms. c. to RHC.{R. H. Coverley - Production Engineer} x 5520 Hs{Lord Ernest Hives - Chair}/Les.7/KW.23.3.34. 20/25 Controllable Dampers. Will you please order 6, Over-riding Control Valve Springs to F.60220. Hs{Lord Ernest Hives - Chair}/I.A.Leslie. | ||