ArmedFerret hit it right on the head. Definately parts gun - you can see the front sight base is from a Type III (milled) rifle as is the gas block, judging from squinting at the photo. It might be the barrel assembly from a Type III but hard to tell. You've probably already checked but it would appear that you'll only be able to utilize the old-school, long-bladed bayonets on it instead of the usual AKM-style bayonets because fo the front sight base and gas block.
Vector was fond of really doing some mix-master jobs on their Polish underfolder builds. In their infinite wisdom, they took East German MPiKM parts kits and mixed them in with Polish PMKMS parts kits, then proceeded to build underfolder rifles. Unfortunately, I still have a Vector "Polish" underfolder that was built with mostly East German MPiKM parts including the entire barrel assembly and trunnion.
We would need to see the trunnion markings (the numbers on the left side of the receiver) on yours to see if it still retains the original Polish trunnion or something else. What does your rear sight leaf look like (is it "1-10" with some sort of a letter; or is it "1-8" with a letter)?