After receiving several answers it seems that this indeed is a factory parts pistol. All the markings are correct and everything matches the frame, without any markings to show it was a factory rework or repair. The barrel matches my model 34, so guess factory had some 35 frames and no more 6" 35 barrels so they just used the barrels. Nice unfired pistol, but it would have never completed with the K 17 for any target work.