Sorry for delay in replying.
I cannot confirm the mag manufacture as no markings on the mag, package indicates made in US! Mag is blocked with a rivet, neatly done. We just fitted a mag to a new Chinese SKS and she fits well and locks the bolt back. I have never pretended to be an authority on SKS rifles, due to the many different manufactures and detail differences I can’t guarantee fit and function in all model SKS rifles. As you can see no problem using clips to load the mag.