Well, I meant to just get one for myself, but realized these are so nice, that I want to spread the joy! These are, what I believe to be, Soviet/Russian AKM/Ak-47 Slings. I haven't gone through them all, but a couple had Soviet markings on them. Either way, these are built super tough, and are a must-have for any Ak Platform rifle.
Styles may vary slightly, but all should be compatible with the AK/SKS platform.
These are all in great shape but please expect minor wear and possible slight corrosion on the metal hardware. That being said, most I've seen are in great shape, so buy with confidence!