I have the opposite view. The square repousee
work plates with round central medallions are known from several provenances 1st century belt plates, so the design certainly matches proper
Roman items. As I noted I don't know enough to know whether they are genuine or not.
By contrast I have never seen a 1st century plate that looks like Kevin's with this animal design. I have seen similar 4th century plates but the leaves look
medieval to me.
SC