Bates type 4.5 inch headlight.
The body is gloss black, the rim is copper, the bulb is H4, and it has a multi-reflector. It also has a blue high beam indicator.

Size: Width: Approx. 125mm, Height: Approx. 130mm, Thickness: Approx. 110mm
Mounting bolt diameter: 10mm
Manufacturer: HoundRacer
Manufacturer part number: HR108