These two mounts are
Roman, they have exact parallels from archaeological finds in various parts of the Empire. The small loops, which only appear on a small number of items sharing the same design are believed to be suspension loops for light objects.
The first item does appear to have
animals promotes on top, though these are not unknown among
Roman items - especially several
types of 4th-5th century buckles. They are of course used by other cultures too. But the rest of the item looks a lot like
Roman belt decorations of the 2nd century AD, similar to but not exactly like the Kloster-Neuburg
type.
As for use. Actual punches for leather or metal tend to be smaller as they need to be used with a hammer as a punch or die. This item has a flat irregular back that would make it hard to used to emboss leather or metal but easy to press into clay to make a mould. It could also just be a test product from one
side of a mould.
SC