Does anyone have an idea about this blade?

[sirupate]

A friend of mine asked me if this was Nepalese, personally I don't think so, I haven't seen one in Nepal in the villages I have been in, nor is there an example in any of the museums, but open to suggestions.
The confusion may come from the name given Tabar/Tarabar by those that sold it, but speaking to a kami Tabar/Tarabar is another word used for Tulwar by some of the less educated Nepalese, and it certainly isn't a Tulwar, so opinions greatly appreciated, cheers Simon