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).
Proposed design for a rivet-less steel bonnet, detailing the top and side hinge sections.
| Identifier | ExFiles\Box 119\4\ scan0020 | |
| Date | 10th July 1931 guessed | |
| MAXIMUM OPENING OF BONNET THIS FIXED PIECE CAN BE RAISED THUS & PLATED OR CAN BE FLUSH & PAINTED SECTION OF TOP HINGE CHROMIUM PLATED SECTION OF SIDE HINGE PROPOSED STEEL BONNET WITHOUT RIVETS | ||