constructing and mounting a porpax

[Tarbicus]

Paul B. wrote:

I could of course be wrong, but damn if my scheme doesn't explain a whole lot of otherwise idiosynchratic features of the panoply.

...well I don't think your ideas assist you here! :lol:
From an engineering point of view, a bronze rim less than 0.5 mm thick adds no "tensile strength" whatsoever, and still less if it is 'dagged' like many of those shown here!!

If the dagged edges are left sharp it'd certainly help stop an enemy grabbing the edge of the shield lest he cut his hand open. Like Alexander said about beards - they're only good for grabbing an opponent in combat. This could be a deterrent for someone grabbing your aspis, perhaps?