Mongol Dogpa knife?

[blue lander]

It does look a little bit like the lothi in your second link. What struck me as most different about this one compared to what you usually see is that the scabbard is sort of bow shaped rather than tubular. It also seems to have a belt loop of some sort. I've never seen those on a Mongol/Tibetan/Chinese one as they were usually carried by tucking them into your belt or sash.

I've attached a picture of my Mongolian knife, which is more or less tubular like your Tibetan one. Both look like they've been sharpened quite a few times. I'm sure mine had dispatched countless sheep during its working life.