Let me introduce your attention the incredible WW1 Original Helmet M16 in native state, Military, Army, museum relic, battle damaged, armor, cap, hat #3. This is a World War I Buttlefield relic. Helmet was dug in the territory of Ukraine. The History of M16 The Stahlhelm = "Steel helmet" is a specific type of German WWI military headgear made of steel, which is primarily intended to provide protection against shrapnel and fragments of grenades. The armies of major European powers introduced helmets of this type during World War I. The design of the Stahlhelm was carried out by Dr. Friedrich Schwerd of the Technical Institute of Hanover. In early 1915, Schwerd had carried out a study of head wounds suffered during trench warfare and submitted a recommendation for steel helmets, shortly after which he was ordered to Berlin. Schwerd then undertook the task of designing and producing a suitable helmet, broadly based on the 15th-century sallet, which provided good protection for the head and neck. After lengthy development work, the first stahlhelm were tested in November 1915 at the Kummersdorf Proving Ground and then field tested by the 1st Assault Battalion. Thirty thousand examples were ordered, but it was not approved for general issue until New Year of 1916, hence it is most usually referred to as the "Model 1916". In February 1916 it was distributed to troops at Verdun, following which the incidence of serious head injuries fell dramatically. The first German troops to use this helmet were the stormtroopers of the Sturm-Bataillon Nr. (Rohr), which was commanded by captain Willy Rohr. The shape of the helmet was predetermined by a combination of the volumes of a cylindrical body, covering the head, and a tapered head, covering the ears from the impact of a sound wave and fragments. The helmet was made of nickel steel. The inner side of the helmet consisted of three pieces of upholstered leather, which were adjusted to fit the head; helmets were also available in different sizes. The chin strap was attached to the metal shell of the stallhelm. Two protruding bushings - "horns" served not only for ventilation, a special forehead armor plate was attached to them, which, according to its inventors, was supposed to strengthen the protection of the frontal part, intended for sentries and machine gunners, but due to its weight it was used quite rarely, and in winter the soldiers sealed them. In contrast to the Hadfield steel used in the British Brodie helmet, the Germans used a harder martensitic silicon/nickel steel. As a result, and also due to the helmet's form, the Stahlhelm had to be formed in heated dies at a greater unit cost than the British helmet, which could be formed in one piece (https://en.wikipedia.org/wiki/Stahlhelm).