My dad bought a new commercial fn mauser in 1954 or 55 that had a new Lyman All American 4x with a post and crosshair reticle. It does not have a centered reticle. I have seen pictures of later models that have "fully centered reticle" on them. It was installed with Weaver mounts. 1" tube.
Hope this helps somewhat to date the scope.
fish head
