Medieval Closed Face Helm Low-poly 3D model is available on CGTrader for $6.99. Original author: SimonTGriffiths. Specs: 3900 polys, 2000 verts.
STL (Stereolithography, filesize: 191 KB), OBJ (OBJ, filesize: 383 KB), GLTF (glTF, filesize: 10.1 MB), DAE (Collada, filesize: 408 KB), SPP (Substance Painter, filesize: 172 MB), 3DS (3D Studio, filesize: 105 KB), PLY (Ply, filesize: 409 KB), BLEND (Blender, filesize: 772 KB), LWO (Lightwave, filesize: 263 KB), FBX (Autodesk FBX, filesize: 289 KB), ABC (Alembic, filesize: 215 KB), TEXTURES (Textures, filesize: 14.5 MB)