Correct lamp bulbs for the 40/50 New Phantom, 20 HP, and Silver Ghost models.
| Identifier | ExFiles\Box 166\4\ img003 | |
| Date | 9th December 1925 | |
| x5800 To EY/C. from EFC. {E. Fowler Clarke - Electrical Engineer} EFCS/T9.12.25. RE: LAMP BULBS. X8800 X3576 The correct bulbs to be used in the 40/50 New Phanton and 20 HP. head lamps are the Lucas bulbs marked :- B.A.S.4.S. 12-14V. 36 W. OSRAM (37) (Gasfilled), the affix S in the first line denoting single pole. The Silver Ghost(1907 40/50 historic RAC 15,000 miles trial) will have the same, but leaving out the affix S, such bulbs being double pole. For the side and tail lamps we have generally used :- Sphinx (Auto Bulbs Ltd) side lamp bulbs, 12-14 Volt, 12 c.p. Bulbs dia. about 26 mm. The smaller bulbs are preferred a-s the larger ones will not go in the Lucas spare bulb cases. Sphinx (Auto Bulbs Ltd.) tail lamp bulbs, 12-14 volt, 3 c.p. No.834P. though no doubt suitable Lucas bulbs are obtainable. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).