4-5th century tunic idea for a germanic warrior...

[Flavivs Aetivs]

I already mentioned the Isla Rizoli Mosaics from the 6th/7th century.

There was a find dated to the 4th century in Scandanavia (very recent in fact, 2012 at least) of a Tunic with Segmentae (squares) and Clavii (stripes).

There are some Tunics with this kind of ornamentation found in Thorsberg-Mose dating to the 5th/6th century and I think some found in the Netherlands as well.