Photograph of a cast metal damper casing, with a blue arrow pointing to a feature on the casting.
| Identifier | ExFiles\Box 99\3\ scan0131 | |
| Date | 14th March 1939 guessed | |
| E.X.S. 487 Damper Casing. | ||
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).