Well, I am a very narrow specialist, so I see caucasian things everywhere I look

. I would say that the guard has interesting floral motiff, probably persian(?) inspired that was quite popular in Georgia, but I guess can just as well be found in other countries that bourdered Persia (arabia). But I don't know, some gut feeling tells me it is not Arabia, and not Dagestan/Georgia, but something in between, I would strongly suspect may be Azerbaijan or something Ottoman(?).
P.S. Did you try to apply the new "dressed to kill" theory ? I mean, you should not have any problems "to sundry unsolved problems in weapons research" with it.