Yep SKS. look at the butt plate and stock lug bolt. Someone has refinnished it. It is what we call in the SKS world as Chinese piss elm. (Got to be careful my wife is Chinese.) When refinishing them the wood feathers badly.The cut out "where the bolt handle is" is for the take down lever. it is not worth a whole lot unless you have a shooter SKS you need a stock for. I have 1 from Russia, 1 from China and 1 yugo on my wall of my office.
hope this helps.
I specialize in M1 carbines and Lugers.
It certainly appears to be a Beijing produced SKS stock.
I stand corrected , thought it was a bolt action but it is indeed a SKS . Good eye .