At the beginning of the 3rd century, the Roman army abandoned the imperial type helmet models to adopt spagenhelm models. However, there is a certain archaeological gap between some models and others that it seems that, still maintaining residual imperial models, helmets used until then by the cavalry began to be used. This type of helmet found in Buch (Germany) seems to respond to this type of helmet that for a time was used by Roman legionaries. As proof is the stele of an imaginifer found in Enns where this type of helmet can be seen represented.
Contrary to previous models, this type of helmet practically covered the ears of the legionnaire and the nape cover falls all the way down. Although it bears certain similarities with the previous types of helmets such as the bowl of the helmet and the neck guard made in a single piece. The adoption of this type of helmet supposes, in turn, that the legionnaire has modified his posture when fighting, a more upright posture, a change possibly related to the use of a larger sword.