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).
Design proposal for a rivetless steel bonnet, showing sections of the top and side hinges.
| Identifier | ExFiles\Box 102\6\ scan0121 | |
| Date | 15th August 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 | ||