It looks like a cross-over between a shortened AVS-36 and a SKS.
So, it really might be an early SKS prototype.
Didn't the SKS 41 shot a pistol round (7.62X25)?
Hey "T", I think you need someone who reads Czech. I believe that's the language its written in.
Why does the one that shoots 7.62x54r(apparently) so less beefy looking then the sks45? Not very smart imo.
Looks like the sks came in 7.62x54 before it changed to 7.62x39