Bear in mind most of the "finish work" is done by the individual vendor. And the Indian factories may make changes with each "batch" of muskets.
The picture showed a traditional, screwed on rear sight but I received this, looks like a sight was welded or brazed on and then the welds "blended" in to the barrel tube.
It's just how they decided to do this particular batch.
Makes no difference to me, it gives it a different look.
If the "fine work" was cleaned up a bit like the lock engraving, muzzle crown, rear sight, etc it would be hard to distinguish this from an Italian repro.
People ask why they don't rifle these, then the cost would go up and people would just buy Italians.
The Indian manufactures don't rifle their guns because of a few reasons.
the first being Indian Law; Indian Gun Laws are strict, rifling is prohibited on many of these guns, which is another reason why the touch holes are not drilled until they get to the distributors in Europe, Canada or the USA.
Another reason why these guns are not rifled is because of the technical challenges of rifling. Rifling is a very unique technology which requires skill, expensive equipment and precision, Rifling is a feature that Indian gun makers are just not up for in regards to gun making integrity.
Most Indian made musket barrels are made with cold rolled DOM high carbon steel; not a high quality gun barrel in my opinion, they make it sound like its high quality but the entire barrel tube preparation process skips many features of European and American gun makers.
Lastly, Indian smoothbore gun barres are simply.... poorer quality, I've worked on a few that were not tapered or drilled correctly. I've seen breeches with 1/4 the barrel thickness on one side and the other with 1/3.. NOT COOL ! Loyalist Arms is the only Indian gun distributor I would trust, they'll let you know if your gun is good for shooting ball or just blanks.
Their breech plugs are often too long or too short with messy and mangled threading on either the plug or the barrel.
I've seen dovetailed underlugs that were too deep and sights that were off center.
In the end ... you get what you pay for, a cheaper Indian gun is nothing more than a cheap Indian made gun. Some are great, no doubt.
Personally if I go the route of a rifled gun, I would never look further than a custom made barrel, the USA has many excellent barrel makers. Pedersoli guns are very good when it comes to rifled guns too, costly yes, but high quality.