These are lovely modern reproductions of the headlamps that were used on Jaguars of the 1950s with twin 7-inch headlamps (Early XK120s had 7.7-inch headlamps, and will not accommodate the J lamp). They were popular aftermarket accessories and were used on many rally cars, as they give far more light output than a normal sealed beam lamp.
They have the terrific-looking proper cloisonne "J" in the center and will work with just about any twin 7-inch headlamp application. They come with your choice of halogen (LLB012: 60/55W) or tungsten (LLB410: 45/10W) p45-base bulbs.
Jaguar part no. C5526/1.
We occasionally have secondhand original J lamps in stock; please contact us if interested.