This example suggests a Giraffe horn hilt (Zraff Hindi) and the maker from Nizwa... This is a Nizwaani Khanjar. (of Nizwa)
I was quite interested in this because of the two old floral studs on the hilt and the big work knife tucked behind with a striking pattern not seen before; on the handle. the two miniature shields over the outer rings are said to be of the Nizwa type but not all and many other makers copy this throughout Oman.. called the same as the Omani battleshield; Terrs. For other part names see # 218.
The pins holding on the two button shaped discs at the Hilt would drive me mad however. (I think they are iron nails!)