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).
Photograph of a No.1 high power block with an exhaust valve.
| Identifier | ExFiles\Box 134\2\ scan0150 | |
| Date | 23th August 1937 guessed | |
| No.1. HIGH POWER BLOCK. 1.500" or 1.600" diameter exhaust valve. Material - Cast Iron. --------------------- | ||