Breastplate with applied stop-rib

Breastplate with applied stop-rib by artist unknown. The breastplate is made of metal, possibly steel or iron, with a curved and rounded shape. The surface appears weathered and worn with dark spots and patches. The top edge is curved with a slight indentation in the middle. There are two small holes on either side near the top, and a central seam or ridge runs down the middle. The breastplate has no visible straps or fastenings. The background of the image is a gradient of dark gray to light gray. The breastplate appears to be sitting on a flat surface. The overall shape is that of a vest.