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).
Comparison sketch of two geometric shapes, a rectangle and a parallelogram.
| Identifier | ExFiles\Box 74\1\ scan0058 | |
| Date | 3rd October 1911 guessed | |
| A B +393 | ||