Thinking aloud ... I have to say that I think...on reflection... that the design work is added to the pommel as opposed to it having been grafted on from another sword ...See
http://www.vikingsword.com/vb/showthread.php?t=8997 for an indicator of that and a possible link as perhaps a trade blade from Europe into Ethiopia. I will try to ascertain what its recent history was and should it have the aroma upon it having been anywhere near Muscat (which I very much suspect) I shall report that to thread. My view points to a Muttrah rehilt.