I'm not totally sure, but I don't think the sights are original. The front should be a longer,sharper knife blade with no bead The rear sight should be a finer sight and the elevator was a double one with small notchs that engaged both sides of the sight.
It is a common problem with old rifles. They were equipped with very fine sights for accuracy at longer ranges. They didn't have scopes so when the owners got older and there eyes got bad thats when the sights were changed out with after market sights such as Lyman or Marbles. They were coarser and easier to see. The originals ended up in a coffee cup in the cupboard.
Never the less the gun is very nice looking and will look good in your collection.
If you have time to do it twice, then you have time to do it once right and put your name on it