Close-up view of an open tank showing the internal float and linkage mechanism.
| Identifier | ExFiles\Box 141\2\ scan0185 | |
| Date | 19th April 1939 guessed | |
| LUBRICANTS RECOMMENDED ENGINE & GEARBOX | ||
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).