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).
Diagram of a Phantom II Twin Choke Carburetor indicating adjustment points.
| Identifier | ExFiles\Box 13\3\ 03-page319 | |
| Date | 15th May 1929 guessed | |
| P.II TWIN CHOKE CARB. No. 1. ADJ SCREW Club Foot. No. 2. ADJ SCREW. CWB/ 3 | ||