Large kukri with talwar hilt.
Clearly from northern India or around those parts, but no joy finding out any more (my usual reverse image search turned out rather funny).
I can add a little more to this one…
The weapon showed seems is called “Sosun Pattah” (though the blade of this blade is not as curved as the one in the image which clearly is a kukri, having even the notch) and its purpose was purely ceremonial.
It has all the charecteristics of a proper mid to late 18th century blade including the notch (cho). Many of these had a plain set of tarwar grips and can be found in the Gurkha Museum, Victoria & Albert, and of course Kathmandu. The older ones are large, heavy fighting weapons.
This is a more or less typical example of a “native” weapon decorated for consumption by British soldiers returning home after service in the Raj. They usually come with special scabbard with “braids” that are called gimp and is found in a variety of widths and colors, but they have no military significance but was and is still used to embellish all manner of weapon sheathes in Northern India.
Hope this helped… :)