A friend gave me an old Weaver k-2.5. Though the mounts are much newer, the scope looks like one I saw in a 1949 advertisement. I'm tempted to mount it on a new Henry .22, but part of me doesn't want to damage it. There are no dents, dings or even scratches, but some light rust on the bottom of the tube. Is there any way to find out the manufacture date? Would I be stupid to have the rust polished off? The bluing is in surprisingly good condition. Any help is appreciated, Michiman.