These headlamps were a factory fitment on Jaguars of the 1950s with twin 7-inch headlamps which were sold in the European market. In particular, they were fitted to Jaguar Mark VIII and Mark IX, XK140 and XK150. These lamps have the distinctive chrome nipple in the center of the glass and a vertical-dip bulb and lens. As such, they were legal for use in the Netherlands, and carried the etched "NL" in the glass. For some reason, one of them does not have this etched feature, though.
These lamps are in good condition, with some patina. They would be a distinctive addition to a Jaguar XK or saloon of the 1950s, and their rarity guarantees that nobody else on the field will have a set on their car!