Hi Dom,
Cross posting via edits!

I agree that the daggers in that thread are in superb condition.
But I still see much ageing and patina that I do not see on yours.
When I think of late Qajar Khanjar I think of them being more akin to this form:
http://www.vikingsword.com/vb/showthread.php?t=16020
The attachment loops on your example reminds me of Arabian Jambiya.
The flat ground oval/diamond section blade with the more simple carved deoration and two colour koftgari look Indian (and show only minimal wear to the silver).
The more complex decoration of the scabbard and hilt have an indo-persian feel but exhibit no patina/oxidisation in the recesses and in general the piece seems like a 'fusion' of styles. but a distinctly 'Indian' feel IMVHO.
I'm certain I've seen another somewhere. I just can't recollect where.
Can you reference this type to dated examples?