None of the repro's I have seen have had the flannel patch at the muzzle end inside of the stock holster.
The first repro's were a bit rough but they have gotten better and none have had the oval inspectors mark....so far.
The quality of the wood, metal work and the rivets is also a clue.
The nice red hue of the walnut is hard to reproduce with stain as is the quality of the inletting.
It sure looks kosher to me....