Now that is very interesting, fantastic recall.  The similarity is unquestionable.  I have not seen the use of the Indian ebony "coromandel wood"  on Afghan items.
On my example the line cut in the blade and stamp are seen on the Afghan/ entral Asian knife with the ivory handle I post earlier.  Does anybody feel it would be unreasonable to assume this has been sorted completely?  Is it or is it not a weapon? any knife is a weapon? 

more pics here
http://www.vikingsword.com/vb/showthread.php?t=5314