I have collected and studied the model 12 for over 40 years. I haunt gun shows looking for good honest 12's. I cant tell you how many "factory ventilated ribs, factory recoil pads, and factory Cutts chokes" that aren't factory that I have seen. Everybody selling one swears it came from the factory that way. In my decades of looking I have never seen a true factory model 12 with a Cutts. Yours sounds like and has the necessary criteria to be factory. Congratulations dude.