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).
Hand-drawn blueprint sketch of a mechanical component with annotations.
| Identifier | ExFiles\Box 16\4\ Scan032 | |
| Date | 19th November 1928 guessed | |
| FRAME F / 1.90 FRAME | ||