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).
Order request for a Lucas H.F. 722 electric horn for chassis 20-EX.
| Identifier | ExFiles\Box 59\3\ Scan171 | |
| Date | 19th May 1932 | |
| X6032 Roy.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.6/AD19.5.32. LUCAS H.F.722 HORN Will you please order for chassis 20-EX to O/No. 54780 one Lucas electric horn type HF.{H. W. Frost - Coachwork Inspector}722 Hs{Lord Ernest Hives - Chair}/Wst. | ||