Only comment here from me is a general one about how some people are convinced that they have the creme de la creme all matching non refurb, unissued SKS. I remember I sold some ammo to a fellow on another site. When we met up I was curious as to what SKS he got. He told me he JUST picked up earlier that morning an all original, all matching, non refurb, unissued 1954 Russian SKS. Given the fact that I have more than a few of these, I was skeptical of his claim. I asked how much experience with Russian SKSes he had. He said not much but the guy who sold it to him (of course) told him it was all matching, non-refurb, etc. and convinced him that if he didn't buy it, he had a whole line of eager prospective buyers who would jump at getting a piece of history...
I said, "you have any photos of this thing?", after he told me how much he paid (hint: he significantly overpaid). He said he will do me one better, it's in the back of his truck. So we went around back, he popped it open, opened the soft case which held this gun...I didn't have to look more than 15 seconds before I paused, looked him and said, "you want the bad news?" He said "don't tell me I was taken". I said, OK, I won't say anything about that, but I pointed out right away the ###XXed out stock (which wasn't even arctic birch) which didn't even have the Tula arsenal symbol. And then on the dustcover, he had the square/rectangle with the diagonal line through it. I said, this thing is a refurb. I didn't have the heart to point out the magazine in which someone clearly scraped away whatever serial number was there (which was blobbed out by a weld anyway) and instead used something like liquid paper to crudely draw the "matching" serial number.
I happened to have my phone with me where I have photos of some of my Russian SKSes and I showed him the difference. After he saw that, he looked up at the heavens, then started kicking his tires, mouthing expletives at such a torrid pace that I thought he was speaking a foreign language.