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 crankshaft with numbered parts and dimensions.
| Identifier | ExFiles\Box 23\5\ Scan019 | |
| Date | 23th December 1927 guessed | |
| 1, 2, 3, 4, 5, 6, 7, 8, 38.400, 31.650 | ||