I'll stick with my original opinion. I think most of the contributions so far go towards the same train of thought.
It's a rifle that likely was sportered or had woodwork and fittings missing that has been put back to standard post service. The woodwork is newer than the rest, not fitted or finished. Just to add here, if it was unissued, it would not have an "S" butt on it either. Some small parts have been refinished, the nosecap isn't original. The receiver, barrel, bolt and sight leaf are all numbered together, and I think even though some of the stamping looks questionable, we have all seen worse. The bolthead is just another part like the rear swivel... I have a jar full of unmarked pristine bolt heads... The bore may well have had little use, or been very well cared for. This may help it shoot well, but may not have as much influence as the foreend if it hasn't been fitted right.
It's a very nice looking rifle, take it out and stick a few rounds through it. Take care of it and you will not be able to pick the wear for at least the first 3 to 4 thousand rounds. I hope it shoots well!