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 various chassis and models with their associated registration numbers.
| Identifier | ExFiles\Box 76\1\ scan0128 | |
| Date | 13th December 1921 guessed | |
| Hs.{Lord Ernest Hives - Chair} 3 G.I.M. C.H.0050 - 0052. Chassis 44GB Registration No. R.2660. " 7-CA " " R.3005. " 1-EX " " R.3382. " 2-EX " " R.3700. " 3-EX " " R.4072. ? " 4-EX " " R.4099 " 6-EX " " R.4529. Marmon " " R.5308. Essex " " C.H.2330 21 26357. " " R.1929. 23 Goshawk II " " C.H.2727. Humber " " N.Y.8176. | ||