I did some work at
http://vikingsword.com/vb/showthread...t=omani+swords on Omani Shamshiir The silver sword knot looks like typical to Omani style but looking at the scabbard it seems to be a replacement...and theres very little other silver work of Omani style on the weapon thus difficult to place. At reference I placed the Omani Shamshiir presented to Henry Morton Stanley by Sultan Bargash for comparison...
Regards Peter Hudson