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).
Registration numbers for a 20 HP car with a Coupe body.
| Identifier | ExFiles\Box 25\4\ Scan141 | |
| Date | 4th July 1928 | |
| X677 To D/L. from Hs.{Lord Ernest Hives - Chair} _ _ _ _ _ _ _ _ _ _ _ X677 (strikethrough) X5770 Hs{Lord Ernest Hives - Chair}3/LG4.7.28. _ _ _ _ _ _ _ _ _ _ Will you please register to the end of the year and obtain numbers for 20 HP. car 12-G-4 - Coupe body, painted grey and black. It is a standard 20 HP. engine. Hs.{Lord Ernest Hives - Chair} | ||