I examined the piece and, as far as I can see, it has no tang. The blade is socketed. I guess the handle is much longer than can be seen. I also think the handle is much older than it looks on a picture. There's a hole drilled in the lower part, probably for a cord
I took a scan of the handle and the lower part of the blade. The red arrow shows the 'seam' of the socket. The blue arrow shows the hole in the handle.
I'm still trying to find out where the piece comes from. Could it be a celurit ?