Grabben this picture from a youtube video. This is a VERY different rear sight. This one came from RGTC and its a Norwegianicon rifle (has the notch). Also this rifle was rebarreled in 1961 and had the markings for it. There are no good pictures of the front sight, but being rebarreled in 1961, I have no doubt, this has roll pin sight.

Attachment 117758