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).
List of chassis and other reference numbers.
| Identifier | ExFiles\Box 25\4\ Scan164 | |
| Date | 6th April 1929 guessed | |
| X. 677 22-EX. CH. 8189 16-G4. CH. 8190. | ||