A traditional masterpiece in polished cast aluminium and faceted glass lens, with a 20w conventional filament that will correctly load the bi-metallic strip of your classic indicator relay, these bullet lights from FORK in Japan com in three types. Well, two if you consider the flat-side version – more scalloped than flat, to be honest – with a choice of regular or deep M8 mounting boss to be a single type.
They take a regular BA15 bulb – 15mm bayonet – are said to come with a red lens, but all picture suggest an orange one, which is good because they’re designed to mount to forks or fender struts.
If you’re getting excited by the prospect of making a stop/tail out of another – or two, because they come in pairs – you’d need a new offset twin contact lamp holder, translucent red pigment of some sort and a bigger hole in the mounting bolt … or a resistor to drop the voltage for the tail.