Knee Defense (Poleyn)

The image depicts Knee Defense (Poleyn) by an unknown artist. The object is made of metal and appears to be a piece of armor. It has a semi-circular protrusion on the left side. The object is gray with a rough texture. The majority of the object is irregularly shaped with jagged edges. The background is light gray. The object appears to be old. A significant portion of the right side of the object appears to have broken off. The object is positioned with the semi-circular protrusion on the left.