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 with handwritten annotations detailing an oil tester body mounted on the engine side of a dashboard.
| Identifier | ExFiles\Box 165\3\ img118 | |
| Date | 21th July 1935 guessed | |
| Feed, from oil pressure gauge line Vent to allow levels to drain 3 way cock Control to knob on instrument board or dash drain to sump Oil Tester body - mounted on engine side of dash 3" 3 1/4" | ||