There is no doubt that the barrel is not original to a 1920's gun; there are no cuts for the ejector rod head (compare # 14 with #1 third picture). I think the factory had to replace the barrel, then had to replace the ejector rod because the new barrel had no cuts for the old head. That ejector rod doesn't look like regular production; it appears to have been made just for that gun. Does the rod head unscrew??
Jim
Jim