This is a new reproduction lens-reflector unit that fits into the chrome back of a Lucas SLR576 Flamethrower lamp. It will fit perfectly into an original back and it will also fit many reproduction backs. "TOP" appears at the top of the glass; there are no other inscriptions on the unit.
We also can supply bulbs: BPF tungsten, NOS yellow or new LED; bulb holders (aka plate contact assemblies), complete lamps and related parts such as switches and brackets; see Related Products below or contact us.