Authentic Soviet Russian Army Steel Helmet SSh-40 Green Head order Protective Battle Hard Hat Vintage OTK Stamped Military Surplus USSR

An authentic Soviet army WWII steel helmet - SSh-40 (SSh stands for "Stal'noy shliem" / Стальной Шлем in Russian or a "steel helmet" in English).
Made in the USSR in 1940-50's. Sold right from the soviet military surplus.
May have traces of time and warehouse storage.
OTK stamped.

The Russian helmet SSh-40 was widely used in the Armed Forces of the Soviet Union during the Great Patriotic War and in the postwar years until more advanced models of the SSh-60 and SSh-68 were put into service.
Made of alloy steel grade 36SGN, thickness of 1.2 mm.
During the war years, it was manufactured at the Red October and Lysva Steel Works metallurgical plants.

The design of SSh-40 differs from the previous one, SSh-39 model, by the lining - simple and sturdy. Hence, their main external difference: in ssh-40, six rivets were used for fastening the lining, in the ssh-39, three rivets. The lining consists of three parts - “petals”, made of artificial leather, which in the upper part of the helmet are connected with a cord, designed to adjust the size.

On the inside of each petal there is a shock-absorbing pad made of cotton wool. The canvas chinstrap consists of two half-pieces attached to the rings order on the sides of the helmet. One of the parts on the free end has a sliding buckle; the end of the other half is crimped with a semicircular metal mandrel.

A helmet sounds like a шлем or shlem, shliem in Russian.
It can also be called Kaska / Каска ( Casque, Helmet, military combat hard hat in English)