Обратите внимание на крепление ремешка к каске- во время воны и несколько позже он крепился заклепками, позднее- пришивался. Такой и показан на видео, более поздний вариант крепления.
As far as I remember, in helmets that were used directly in the Second World War, the straps were attached to the helmet with rivets. After the war, for some time they also held on like this. Later, the straps on the helmet were sewn on. You have such a helmet.
