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).
Internal request to obtain two Lucas Electric Horns, type HF.722, for order numbers 54856 and 54870.
| Identifier | ExFiles\Box 59\3\ Scan172 | |
| Date | 28th May 1932 | |
| X6032 Roy.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.6/MA. 28.5.32. LUCAS ELECTRIC HORN TYPE HF.{H. W. Frost - Coachwork Inspector}722‡ Will you please obtain for us two of the above type horns to order Nos. 54856 and 54870 Hs{Lord Ernest Hives - Chair}/Wst. | ||