There are no further informations known to me yet but in view of the circumstances of its find, it is unlikely that more details such as its mounting can be achieved from the piece, especially as this seems to be a unique object without any comparison finds
What I am also wondering is: how did they have dated the find? Only by typological methods? In order to achieve a more reliable dating an analysis of the irons chemical composition would be helpful but in view of the size of the object it will not be possible without damaging the piece.
Is it an original of the 15th Century? Or maybe only a model of the 19th Century? I really hope the first one.