Little debate ongoing on another forum...
Was the late Republican Roman helmet bronze?
And early Empire, 1st century AD, were auxilia in bronze helmets, legionaries in steel?
That's what I gleaned from AEIR, but wondered if it had been changed through more recent research.
Late Republican helmets were mostly bronze Montefortino and Coolus types, with some iron Gallic styles (the Agen-Port styles) being adopted from Caesar's day onwards.
Imperial legionaries might wear iron or bronze. Auxiliaries are a lot less certain, but also probably both, with maybe bronze being more common then in the legions.
Thanks Duncan - appreciated. I'll pass that on.