A neat rear lamp as Rubbolite number 25 lamp, with single mounting which can be supplied with a flat lens instead of the domed red lens fitted, to give a lamp of vintage appearance, into which 5w bulbs only will fit. double contact bulb holder. measures 65mm diameter. bulbholder wires or rear. Uses a BA15d bulb, for spare bulbs please see our B383 (6v) or B381 (12v).