I doubt that a Team Champion (or, earlier, Champion Team) would have been produced with fender eyelets, a seatpost requiring a separate clamp, or turkey-wing brake levers. Are there any tubing decals (such as, on downtube just below the head tube)? Are the front and rear dropouts stamped Campagnolo? What does the frame weigh, bare except for pressed-on fork/headtube races?