Barely visible mark on Navy?

[LugerVern]

I noticed this mark on the barrel underside of a reworked Navy and was wondering if anyone might recognize it or have a clear picture from one of their guns of what it looked like before the refinishing. I know itâ??s not much, barely visible to the eye but definitely there. Both views are of the same mark and you can see the Crown N stamp to the left to give you size reference. I think maybe a barrel manufacturer mark because it was so lightly stamped, but really have no clear idea. To me there are two marks, a J shaped one and a smaller H shape.

Thanks

Vern