Roman helmet surface

[jvrjenivs]

But you suggest that in one legion the armour, shields... vary? I can agree that in different legions the equipment may vary (different standards, helmet types, different scuta layout), but in one legion the equipment should be the same? As for example shown in Trajan's column.
Can you suggest me more literature (proven to be accurate)? I read many books, but they suggest different theories.
Thanks!

Yes I do. But I think we slightly go off-topic now. But as for the shields, of course the form of the shield shouldn't vary much, as that makes certain formations difficult, or impossible to make. But yeah, I think different loricae (that is hamata, segmentata, squamata) were worn next to each other, and the same goes for helmets. For books, start with Bishop & Coulston - Roman military equipment, 2nd edition. Then, there are more interesting reads, but I wouldn't suggest your one or two more of them, as there is a whole bunch to read.