About the cross-guard, other than Ottoman, could it taken from a European mameluk sabre, like this one?
https://www.sabresempire.com/2012/03...uk_04.html?m=1
Although there are some Ottoman guards of similar proportions, like this one.
https://www.metmuseum.org/art/collection/search/31300
The only strange thing about it are the quillon endings, usually they have a circular or polygonal (regulate octogon for example) in cross section. This guard seems to have a rectangular cross section.