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).
List of recommended standard lamp bulbs for various vehicle applications.
| Identifier | ExFiles\Box 166\4\ img043 | |
| Date | 8th January 1930 | |
| X6089 8.1.30. LIST OF LAMP BULBS RECOMMENDED FOR STANDARD. Headlamp bulbs. 12-14 v.{VIENNA} 36 w. gasfilled, centre contact S.B.C. cap, BAS. 4.S. (Osram No. S.7012) Central lamp bulb. 12-14 v.{VIENNA} 48 w. centre contact, gasfilled, S.B.C. cap, (Osram No.S.7014) Side lamp bulbs. 12-14 v.{VIENNA} 4 w. vacuum, centre contact, S.B.C. cap (Osram No.S.7126) Tail lamp bulb. As side lamp bulb. Instrument lamp bulb. 16-18 v.{VIENNA} 3 w. Osram S.7954 with S.B.C. centre contact cap as arranged with G.E.Co. by R.R. Thermometer lamp bulb. As instrument lamp bulb on 40/50 HP. but on 20 HP. 16-18 v.{VIENNA} 3 w. Osram S.7954 with screw cap. Inspection lamp bulb. 12-14 v.{VIENNA} 6 w. vacuum, double contact, S.B.C. cap. BAS. 10.D. (Osram No. S.7168). Body lamp bulb. 12 v.{VIENNA} 9 w. half opal, vacuum, double contact S.B.C. cap. EFC. | ||