Hi and welcome. Others will chime in, I just been hanging around the forum a lot today as I'm presently homebound.

Your gun appears to have been born somewhere around the month of July in 1896, the receiver should say "MODEL 1896". It appears to be a sporterized rifle. But don't despair, it happened with a lot of Krags because it made into a darn good hunting rifle for little money back in the days the gun was surplussed by the government. The monetary value is not great, but you probably won't be selling it anyway as it appears to be a family heirloom which makes it invaluable for what it is. If it was my Dad's/Grandpa's I'd keep it just as it is and enjoy it.

The sights are not original. The barrel has likely been shortened. The stock is original (maybe not to this gun) and has likely been sanded to rid it of military markings so it looked a little more "civilian". Interesting that the trapdoor has no small holes in it for 3 sections of cleaning rod. Plus a hole for an oiler and another as a lightening hole (covered by the buttplate). You can pull the buttplate off and see if there is any evidence that the holes were plugged.

You may get more comments with a few more pics, especially showing the butt with the plate off. Any markings on the barrel?

Lot of info on this sight so you came to the right place.

Another.

Another

The sights are definitely aftermarket. I'm not sure what the wood piece would be for the rear sight unless it is a makeshift spacer of some sort. The hole under the butt trapdoor appear to be filled with epoxy, along with the butt stock ahead of the buttplate.
Do you know the last time this gun was shot? You may want a gunsmith check it out in case you plan on shooting it yourself, just to be on the safe side.

If you can take some more pictures from different angles, it would help identify the changes a little better but you have a well altered Krag rifle that was probably made to use for hunting like many sporterized military firearms, including Krags.

It looks like the rear sight is screwed into the rear part of the barrel ahead of the receiver. If there are holes tapped into the barrel, they are hard to cover and hide if you wanted to try to restore the rifle to military appearance. The rear sight is probably matched to use with the front ramp sight.

There are many changes you would have to make which would be expensive to restore this Krag. The receiver looks very nice but the barrel and stock are altered a lot and you are missing a lot of correct pieces.

It might be best to use this as an altered sporterized Krag and enjoy it as such and save up for an unaltered version as a collectible. You could shoot and enjoy both, then! Most of us have a nice sporterized Krag in our collections. It's even nicer when there is some family history behind it.

Enjoy!