JT76 the scope number is fine. You have a peach of a rifle. Some people are so keen to see problems they see things that aren't there......
There is considerable variation in the precise positioning of the scope serial number just behind the cocking piece. Likewise with other markings such as the S51, but this is not surprising as they were stamped by hand in a hurry. Also, if the rifle had originally been assembled as a 'less telescope' rifle, it is unlikely to have been stamped with the body side wall T, which is clearly there for all to see. Don't fret about your rifle, it's a belter!
P.S. If you'd like a little more reassurance try removing the butt from the butt socket & have a look at the rifle serial number stamped into the usually hidden part at the very front. I would be exceedingly surprised if it is anything other than the number of your rifle.