well i like centurion not only that his helmet reminds of cent from for honor but that galea was great and made them cooler and impressive on battlefield......that's why plumes where used at first i though it was used to represent ranks and A signaculum was a lead "dog tag" in a leather pouch carried by Roman soldiers around their neck. It seems to have had personal details (acting to identify a body the same way a modern dog tag does) with a seal or stamp to authenticate it.