Late Roman Attic helmets

[Kai]

Now this was exactly what I wanted to show: The ridge helmets were of many kinds and the Arch of Constantinus shows us that the later Frankish helmet of the Carolingian Age was nothing else than a Late Roman model (like the exemplar sculpted on the Arch) that continued its life without interruption till the Carolingian Age. This is probably more likely being happened in Gaul, where this simpler model of ridge-helmet, slightly enlongated on the sides, to protect the neck but also to compensate the absence of the cheek pieces, probably was largely widespread during the last years of the Western Empire, when the Public Fabricae didn't guaranteed anymore the supplies for what remained of the Roman army in Gaul.

I am aware this helmet is present in late antique and early medieval art, but has there ever been an actual specimen unearthed?
Very nice artwork btw!