CRAWLMACHINE, welcome. I have collected and studied this model for over 4 decades so I do have a little knowledge on the subject. Sorry to say that while this is a nice looking rifle with a hideous scope installed on it, it is not a supergrade. Winchester never wrote supergrade on the barrel by the sight. It wrote it underneath the barrel and can only be viewed when the action is removed from the wood. Next supergrade swivels are entirely different from the swivels you have. On original supergrades, the words supergrade are stamped onto the floorplate. So while it is not a supergrade it is still a fine looking rifle.