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).
Page 2 of a document describing the recessing of tube rivet heads.
| Identifier | ExFiles\Box 74\2\ scan0133 | |
| Date | 3rd May 1912 guessed | |
| (2) to allow the tube rivet heads to be suitably recessed. | ||