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).
Cross-sectional blueprint of a mechanical coupling or flange assembly.
| Identifier | ExFiles\Box 40\4\ Scan200 | |
| Date | 20th January 1927 guessed | |
| B, C, D | ||