$30 Roman shield 3D model by tartino. Available on CGTrader with 1055 polys and 955 vertices. Geometry: Polygon mesh. Check it out on CGHub.
OBJ (OBJ, filesize: 602 KB), DXF (DXF, filesize: 590 KB), C4D (Cinema 4D, filesize: 675 KB), 3DS (3D Studio, filesize: 597 KB)