Indo Persian Tulwar; opinion needed as to age

[drac2k]

I recently acquired this tulwar which I'm not sure as to the age.It is a heavy chopper, that has a good look, regarding age, wear, and there appears like there is some patterning in the blade.There is a profusion of armory marks that could be good or bad.
In my opinion, there is just something not quite right about it; maybe because of all of the good copies coming out of India, or just because I got it much too inexpensively.Opinions would be appreciated.