The helmet is from the personal collection. Completely original. According to the collector the owner of this helmet served at the airfield Neutief in the city of Pillau (now Baltiysk). Missing the wrist strap. Size of helmet - 64. The size of the liner - 56
It is screwed into a telephone pole, or possibly even a tree, and creates a step for someone to climb up. They would have to screw in several of them on their way up on each side, to hang phone lines. The little edge sticking up on the end is so your foot doesn't slip off. After screwing it into the pole, the angled piece pushes into the pole as you put weight on it, making it stable.