Could be some sort of seal or even bale mark. Many places used ancient designs on one side of those (eg Nemausus = Nimes).
Seems there should be part of the legend on the left hand picture legible - would be nice to see a clearer picture focusing on that part of the object.
Seems there should be part of the legend on the left hand picture legible - would be nice to see a clearer picture focusing on that part of the object.





















