My guess would be that the pommel and probably the hilt as well were married to this blade specifically for the collectors market. Certainly the pommel wasn't carved yesterday, but it looks like the latter half of the 20th century. Stylistically it looks a bit off and doesn't have the grace and curve of earlier pieces. Something not quite Moro about it, but that could just be in the level of execution. Are you sure it's ivory. Pictures can be decieving, but it looks more like bone to me.
The blade, as commented on, is much older, probably late 19th - early 20thC.