As my User Name indicates, my SKS is a NViet SN 641516.
I have only shot it twice since 1972. I have oiled it a few times in the last 50 years. I noticed there is still cosmoline on areas of trigger assembly (never disassemblied) and bayonet guide groove.
Back then, there was a bit of confusion in-country about who manufactured it. Chicom, "rare" Soviet or North Viet. I have both multiple War Trophy Registration (Army and AF) and "Transporting Firearms (Temporary Export License)" that had been mailed to my parents house (8,000 miles from where I was) about 40 days before I left RVN. I kept the envelop too.
All part S/N's match. I counted 9 locations. Are there any I missed? The stock is difficult to read, unless you know the number you are looking for. All others are perfectly clear.
I have some other things of possible interest, like a wooden case that was said to be NVA issue. (Photo in First Time Poster thread.) The Registering guy (1972) that knew the correct mfg location and date code in SN, was the one who said case was NVA issue. I'm really anxious to know if anyone here is familar with this. I've never seen another or anyone mention.
I appologize for photo lighting. I had 4 lights, but some details still don't show well.
I took a lot more photos.
I included one photo of bullet damage. Bullet entered top of foregrip, grazed gastube (no effect on function) and exited through front of stock, removing chunk of wood. Stuff happens.
Me: US Army, tour ended late Nov 1972-ceasefire was early 1973, detachmt CW3 asked if I wanted to stay after ceasefire as advisor-No thks-didn't think it would last a week, guys that cleared our paperwork got on board plane behind us, see Wiki: Easter Offensive 1972 for details of this period.