Byzantine scalloped armour edges

[Urselius]

As can be seen from the illustration of military saint from the 12th century shown below , the outer edges of Byzantine armour are often shown with a scalloped edging.

http://cdn.romanarmytalk.com/media/kunen...turyAD.jpg

Also shown on some other examples here:

http://protostrator.blogspot.com.au/2013...ts-in.html

For the lamellar klivanion (see centre figure) the edging has an obvious function, a leather band to prevent the edges of the outermost lamellae of the cuirass rubbing against clothing or other armour elements (such as a splint kremasmata skirt as shown here) worn under the klivanion.

For the figure on the right there is a problem - his armour, shown as a very fine scale structure but usually interpreted as mail, is a apparently a homogeneous construction, a shirt reaching the elbows and knees. However, at the points where a klivanion would sit there are scalloped elements again. This raises the question what are these for? It could be that fashion dictated that entirely functionless leather edging was applied to give the impression that a klivanion was being worn, or it could indicate that some Byzantine troops wore doubled armour: i.e. a conventional mailshirt with an additional waist-length and sleeveless mail "vest" over the top to protect the torso.

Any opinions?