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 detailing the correct calibration for an engine oil level indicator gauge.
| Identifier | ExFiles\Box 175\6\ img011 | |
| Date | 8th April 1929 | |
| E.77064 60° ¼, ½, ¾, 1, 1¼, 1½ 13°, 10°, 10°, 12°, 6° GALLONS CORRECT CALIBRATION OF ENGINE OIL LEVEL INDICATOR TO SUIT MODIFIED LEVERAGE TO LEC.2672. A.J.L 8-4-29 | ||