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 of a mechanical component with dimensional annotations.
| Identifier | ExFiles\Box 168\3\ img130 | |
| Date | 12th April 1939 guessed | |
| 3 3/16, 2 11/16, 3/16 DIA, 2 5/16, 5/16 DIA, 1 3/16 DIA, .061/.062, 7/8 Z | ||