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).
Blueprint diagram illustrating a cross-section of a component assembly with a rubber block.
| Identifier | ExFiles\Box 6\4\ 04-page183 | |
| Date | 1st January 1923 guessed | |
| F.30 G 51552 G 51689 RUBBER BLOCK | ||