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).
Sketch of a typical American adjustable spring shackle.
| Identifier | ExFiles\Box 4\6\ 06-page10 | |
| Date | 9th June 1922 guessed | |
| Typical American adjustable spring shackle 7/8" to 3/4" dia for passenger cars Oy June 7 | ||