I'll muddy the waters here a little probably but when I saw this I thought of the hilt on this sword on artzi's site. Again not a great match but I thought I saw similarities
http://www.oriental-arms.com/photos/...02210/ph-0.jpg
Can we get more info on the central asian provenance ? This sword is south east asian and I think the blade style may fit knives from the same area as the sword on artzi's site but someone here may know better than I do. And often we can see what we want to so often I see Thai/ Burmese influence where it is not.
Here are some thai knifes posted by Puff in another post included for a reference on some common knife blade styles from that area. Look at the 4th from the left
http://www.uamulet.com/showsoImages/Pic_7486_1.jpg