So what about the precourser SKS? I used to own a couple of the Yugosav renditions. Tragically lost in a boating accident. They were delivered to me at a gun show for a cnote the first time and two the second time. It took several cans of carb cleaner to remove the cosmoline. Sweet battle rifle when fitted with larger magazines to accept the ten round stripper clips. Has the SKS got a logo? The things were packed up in 1947 but battle ready to that day when they got lost. I think I’ve seen 100 round drums to fit but fifties and thirties are readily available. Just keep stuffing the stripper clips into the magazine.
Yugoslavia wasn’t licensed to produce SKS’s until 1959, hence the Model 59, and subsequent 59/66 with the inclusion of the grenade launcher. 59/66A1 added luminous night sights.