Umbones for republican scutum

[M. Demetrius]

There are so few umbones found, that it seems safe to use that engraved one. There are a few found from different periods, so I read, that are engraved in different ways. The design looks plausible, though it seems more Celtish than Roman, that doesn't disqualify it, at least in my book.

One big deal is to make sure the curve of the umbo matches the curve of the shield...but afaik, this shape, with the wooden spines on the front side is one of the variants of a Republic shield, but I couldn't say exactly which century.