Some Russian SKS I have seen have the Russian mark on them. I don't know for sure if every Russian SKS was marked that way or not. I know from SKS's that the dust cover, bolt, trigger, trigger guard, receiver, and some stocks have the number stamped into them. If they don't have numbers it seems to me that they have been swaped out with other parts or the numbers taken off. Also, which bayonet did it have? Sometimes these get swaped out for what people want and remove the ones that came with them or take them off and the new owner replaces it with what they can find. If you can take some pictures? I got a friend who has a Russian SKS who would maybe sell it. With the price of and SKS why not get an AK as they a just a bit more and I feel a better rifle?