Here it is after some gentle ministrations. More to be done for sure, but best to "warm her up" and then start again.
The sight is adjustable for windage as opposed to some that were not. I have not researched any further.
I went with the rounded British front sight endcap as opposed to the square Indian one. I also added the stacking lug well, because I could.
I have no idea what these markings mean. More research needed.