I've had this one since the late 1960's. As a teenager my Dad and I would go to the Washington Courthouse, OH fleamarket. We got many of our original good pieces there. I had this one before I knew it was a New Lexington. Wasn't until sometime later I matched it to a crude line drawing in Gerald Brown's first book. His was marked, mine isn't. Unique to this unit is that it has a 1 3/8" pin hole. Has anyone seen another large pin hole in the U-746 series?