An early Medieval seal stamp

Seal Stamp from the middle ages

Medieval seal stamp bottom

One early ages bronze / brass stamp with a standing man at the front maybe it's Jesus Christ. Next to him on the left side a cross that is also written in mirror text. A few letters in it on the left side above and start with these letters ---W---E---N---W---A---V---L---X---together these letters make the word ---menwavlx. The bronze stamp with inprint lays on the table of the Dutch archaeologists now. Maybe they can tell me where the seal stamp exactly came from and from what date it is.