Though this looks like a Roman cavalry helmet, it appears to be the case that the ‘’Von Gravert’’ helm was both a Roman infantry and cavalry helmet in the late 2nd and 3rd century and worn by Legionaries and Auxiliaries alike. The helmet provides quite an extensive amount of protection without hindering the eyes or ears of the warrior within. The original helmet was found on the archaeological site in Niederbieber, on the remains of a Roman Auxiliar-Fort near the Raetian Limes at the Wied, a tributary of the Rhine. Helmets of this type were probably worn by both the infantry and the cavalry during the 2nd and 3rd century AD.

The references: https://de.zxc.wiki/wiki/Niederbieber_(Helm) https://instumentalst.com/ https://romanrecruit.weebly.com/helmet.html https://www.roma-victrix.com/summa-divisio/armamentarium/cassideae-et-galeae/niederbieber-ii-iii-sec-d-c.html