An interesting idea, but certainly not a nimcha type saif. I don't think I've seen one with a blade so wide, but they are famous for imported blades (they seem a coastal weapon to me). The reason I say "no" is the guard. It is structured differently from a nimcha guard, though the quillons are of square section, which is a similarity(!). First, there are too few of them, and there don't seem to "be" missing ones. Second though is the basic structure. Nimcha guards I've seen are made two ways; (A) one (Yemen, Swahili, etc. AFAIK) is a single piece with a hole poked thru it for the tang (and sometimes an annoe, probably welded on). These are typically forged-surfaced. (B) The other (AFAIK Moorocan and IMHO likely Maghreb? Though Magreb Berbers have a known sword that seems a version of the type for pommel and blade, but is guardless.) seems to be welded up with two cheek plates forming two sides of the tang slot and the ends of the quillons welded between them (this is somewhat speculative; I've never etched these. They are smooth/ground/filed surfaced, and I once thought them castings, actually, because of the surface, and because the tang slot is sometimes hollower inside than at the ends, but I've seen them to show fibrousness appearing to be wrought iron and forging marks. In any event, they, too have only a slot for the tang. The structure I've proposed is seen with later medieval European swords.). Both types have very short, almost vestigial, lagnets (bottom only) that run very close to the surface of the blade, and are often "clenched" down to it, with or without a coinlike soft metal "slug" in between. Turkish hilts are different, and are essentially similar to the guard part of a tulwar; they have a large hooplike opening that admits handle material and/or adhesive. The lagnets (upper and lower) run off from the edges of this hoop, and so bind the surface of the handle and run considerably higher than the surface of the blade (sitting outside the sheath) as we see here. The quillons of this type I've seen are welded on, the hoop having been formed in two halves (structurally similar to B above, but a much wider and rounded opening.), and are usually round, square but rotated 45 degrees or otherwise rhomboid (bladelike) or flattened section, but not usually square with this orientation. Arabian per se saif may be, but I think it's like the Turkish ones, from what I've seen. If anyone can tell us more about the structure of Arabian, Persian, Moorocan, Slavic, and Sudannic (or any other) versions of the four lagnet (Turkic? Persian?) hilt, I'd appreciate it.
The round overlay you mention is actually particularly similar to the rivet burrs on the gun stock I mentioned, which a similar one to recently appeared in some photos; maybe from a museum? Maybe from Wolviex (did I spell that right?
) ??? I posted mine to the old swap forum if that exists; I think I called it a "gun handle" or "musket handle" in the title, but there may have been other words, too.....