Funny
In the search for reference on an other knife I found two that is most likely from the same area as this one....
http://akaalarms.com/sold-huge-ivory...tan-ref-10162/
http://www.google.dk/imgres?sa=X&hl=...:0&tx=88&ty=94
Especially the last one, with the circles on the back of the hilt and at the end.
Both dealers claims that these are from North West India or Afghanistan....