Khyber knife

[Conogre]

I haven't got a whole lot to add to the already excellent statements on this old warrior except to add that if you look very carefully at the upper edges of the hilt, they seem to have been re-shaped somewhat on both sides, so some small "ears" can't be entirely ruled out, IMO, although later Russian shaqas seemed to tend away from traditional ears as well.
As to nomenclature, I've also seen the type referred to as a "pathan knife", as well as a karud and choora.
I've also seen some recently that are in the true Salwar sabre size range and being sold as such, but that lack the T-spine and seem to have one or two fullers.
I know that Windlass Steelcrafts in India made a duplicate/replica that was offered in United Cutlery for a while that also lacked the T-spine, but those had no fuller that I was able to discern.
My only guess would be that in areas like this that border a traditional weapon style, local smiths might be influenced by those that they've seen yet modify it according to what their own people are more familiar with?
This one, by the way, is a beautiful piece, in my opinion as I love the "battle trophies" that are on their 2nd and 3rd incarnation yet still remain true user weapons, often in combat.
Mike