Roman helmets: Imperial Gallic/Italic and Ridge - comparisons and sources

[Dan Howard]

We are taking about Trajan's column. How much Roman mail is depicted compared to segmentata?

I have no idea whether the Praetorians wore segmentata or not. I'm happy to be persuaded by your evidence but Trajan's column isn't evidence; it is a circular argument: "Trajan's column is accurate because Praetorians are wearing segmenta. The Praetorians wore segmentata because it is on Trajan's column." You need external corroboration.