Metal plate beneath Linothorakes or Spolades

[PMBardunias]

To be honest Paul, I thought you were correct, but Giannis has convinced me it is a chiton.

Yea, me too! I owe Giannis a debt of gratitude for catching that and setting it straight.

The way they are pinned down is visually very similar to the T&Y.. maybe something to look into?

My assumption has been that the way material overlaps the shoulder like that on garments is how the T-Y attained its form. As it got thicker, it could no longer be pinned or buttoned directly and required the thong to attach it. This is why I thought the image above a "missing link" of sorts, but I had never seen those long pins. Once they became true shoulder "flaps" there were benefits to them extending down further. One might be that if short, a thick flap would be harder to get to flat against the chest- it is easier to bend a long stick than a short one for example. The of course their is added protection and padding as well as easier access to the securing point.