Fits many British motorcycle and Moto Guzzi Ambassador and Eldorado models. 53mm Diameter.
Lucas replica reflector. Looks like the original but does not have any lettering on the face of the reflector.
Comes with a screw but can be swapped out for the hardware needed for your application. The bezel pops off and the rubber part can be mounted. Use a bit of soapy water to help with reassembly.
Red is also available. Not a problem to combine the shipping if you need a complete set.
Consult your parts manual for proper fitment.