Are the two bare-chested swordsmen here (http://warfare.tk/6-10/Byzantine_Casket_with_Warriors_and_Mythological_Figures-MMA_17_190_237.htm)wearing the oft-derided Sasanian globe hats? Their baggy trousers , in contrast with all the other figures, do suggest that they are based on some sort of "easterner" image.
Interesting that there is a contemporary source for them
Well it is 300 years later! However, it s an Eastern look as Duncan says and is a classy c depiction of a globular hat on a warrior!
Roy
Even more interesting if they turn out to be Arabs then 8)