Original German Steel Helmet Stahlhelm M40 Relic of Battlefield WW2 World War2. The Helmet M40 was found on the Battlefield of East Front. The condition of the helmet is on the photos – see all photos carefully. It has the parts of original liner. Dimensions: 285/235/150 mm – 11.2/9.2/5.9in. Diameter – 650mm/25.9 in. Weight is 1.140kg/2.5lb. If you need more pictures, ask!