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).
Request to obtain three dozen Osram lamp bulbs following a recommendation to change wattage.
| Identifier | ExFiles\Box 166\4\ img095 | |
| Date | 20th January 1931 | |
| X6089. Roy.{Sir Henry Royce} from EFC. EFC8/AD20.1.31. X.6089. LAMP BULBS. Will you please obtain the following Osram lamp bulbs :- three dozen 12/14 volt 48 watt S.7014. S.B.C. cap, centre contact. These are required in view of the recent recommendation concerning the use of 48 watt headlamp bulbs in place of 60 watt bulbs. O/No.54733. EFC. | ||