Oh yeah, definitely an Alby mag there. That stock looks
outstanding, you got a real keeper there fenceline!
It's funny, Albys are the red-headed stepchild in the SKS world. You'll see numerous posts around the net trashing the build quality, trashing the accuracy, trashing the cruddy condition of most of them. The numbers don't lie though and they are considerably more expensive here in the states than a typical Yugo, Romy, or Chinese gun. To be honest, they are giving the Russians a run for their money price-appreciation-wise over the past 24 months.
I personally love em. One of my top two favorite SKSs in my collection is an Alby in so-so condition (with a Russian trigger group just like yours).