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 showing a cross-section of a machined component with dimensions and tolerances.
| Identifier | ExFiles\Box 179b\3\ img235 | |
| Date | 21th September 1932 guessed | |
| 1.405 DIA +15 -5 .075 +10 -0 A 45° DIAG No. 2 .100 RAD +10 1.675 DIA +10 A' | ||