Historical information

Blackout lights were widely used in WWII military vehicles, especially in jeeps, trucks, and armoured transport vehicles, to reduce visibility from enemy aircraft and enhance operational security.
Similar designs were used in civil defence vehicles and emergency response units in the mid-20th century.
These covers were commonly used as blackout light covers on military vehicles during wartime, particularly in World War II and later conflicts.
The slotted design helped direct light downward, making vehicles less visible from the air while still allowing some illumination for convoy driving.
The bottom component might serve as a mounting or focusing element, potentially diffusing or redirecting the light output.

Physical description

These are military or blackout-style vehicle light covers, consisting of two separate metal components.
The top piece is a round metal cover with three elongated slits, allowing limited light to pass through while concealing the direct source of illumination.
The bottom piece appears to be a cylindrical housing with angled metal blades, likely designed to direct or diffuse light output.
Both pieces are made of black or dark-coloured metal, showing signs of wear, scratches, and rust, indicating long-term use or exposure to the elements.