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 order memo for a loudspeaker and a choke for a private account.
| Identifier | ExFiles\Box 27\4\ Scan179 | |
| Date | 3rd December 1929 | |
| X 3035 O.O. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 3/MJ. 3.12.29. Will you please order for my private account - One B.S.7. Webson Moving Coil Loud Speaker. One Webson Choke. Inductance, 40 Henry. D.C. Resistance, 220 ohms. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||