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).
Record card detailing the fitting of Bonnet Tongues, part number E 2720.
| Identifier | ExFiles\Box 25\1\ Scan050 | |
| Date | 26th September 1912 | |
| R.R. 512/2 1/2 st.{Capt. P. R. Strong} (X. 435. 14.12.11) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2227 a/s. JAA X1140 & 386 Section 102 Description Bonnet Tongues E 2720 Date | Miles | REPORT | Date | Miles | REPORT 27.8.12. | | 1926 fitted 10.9.12. | | 1716 " Superseded JAA 26/9/12 | ||