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).
Confirming the dispatch of one dozen 12 volt Royal Ediswan half watt lamps for a lighting installation at W.W.
| Identifier | ExFiles\Box 38\3\ Scan279 | |
| Date | 23th December 1920 | |
| To R.{Sir Henry Royce} from EFC. X.3362 EFC3/T23.12.20. X.3362 - LIGHTING INSTALLATION AT W.W. We are sending to you under separate cover one dozen 12 volt Royal Ediswan half watt lamps for the purposes of your lighting installation as requested by Mr. Elliott, a short while ago. EFC. | ||