Realize that in wartime the Russians used whatever was available for slings - leather trouser belts, rope, tractor fan belts - you name it. But the web style with leather dog collars was the standard.
You win!!!!! The guy I work for part time got a bunch of them in with the matching ammo pouches. He was going to just toss them because they were extra...I of course had to intervene...they now have a nice home...my home