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 memorandum requesting the purchase of various light bulbs for the Experimental Department.
| Identifier | ExFiles\Box 166\4\ img079 | |
| Date | 27th October 1930 | |
| X6089 EFC5/AD27.10.30. Roy.{Sir Henry Royce} from EFC. Will you please order from the G.E.C. for use in the Experimental Dept. the following bulbs :- 12 16-18 volt 3 watt vacuum bulbs with S.B.C. centre contact cap Cat.No.S.7954. These are required for Phantom instrument and thermometer lamps. 12 12-14 volt 4 watt vacuum bulbs with S.B.C. centre contact cap Cat.No.S.7126. These being required for side and tail lamps. EFC. | ||