Gladiatorial mosaics from Cos

[Nathan Ross]

The only other reference I know of the Roman use of Coifs is the Ebenezer Frescos at Dura which are also dated to the 3rd Century.

There's also an illustration in, I think, an illustrated manuscript of Vergil (group of standing soldiers - others could probably correct me on the source). But I've doubted in the past that either these or the men from the Dura fresco were intended to represent Romans. Not that I've got much more than gut instinct to inform me on that view!

John M Roberts's idea of an arming cap (sub-cassis?) seems quite convincing though.