It looks authentic to me, but you can check whether it is magnetic or not (it should be non-magnetic) and you can compare the dimensions with those on the coin page, and especially the weight, if possible.
You'll note further down on the page that there are different placements of the dots used as mint marks. Yours has no dot and was therefore struck in Calcutta.
Eastern coins with foreign scripts are generally of low value because "westerners" can't read them and there is no nice pictorial theme to make them attractive. That's why even Umayyad and Abbasid coins ─even silver coins─ are rather cheap. One cannot even read the bloody year of issue without extensive training in the Arabic language because they spell it out!
