Somebody got drill happy unfortunately, or used something grotesque to try to make another hole in the upper tang. Winchester would never drill through their name or any of the markings on their guns. Also, if your barrel is 24", you may wish to check to see if it was trimmed back. You could order a 24" barrel on a rifle, but it was special order and there weren't a lot of them ordered that way. Possible yours came 24", but doesn't hurt to check/ Standard length was 26". Not sure about the front tang screw, hard to tell, it is close.
Matt