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).
Hand-drawn sketch of a component with annotations for oil pump drive and bore dimensions.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page197 | |
| Date | 4th February 1933 guessed | |
| This hole bored 1.250 down from top face oil pump drive .750 DIA .6675 DIA | ||