I saw a pre 64 (1948) model 70 that was in very good condition. It has a two piece rear sight on it. You can flip
the back one toward the action or the front one toward the front sight.

I was wondering if this was a option way back then or if it is aftermarket. The installation was excellent if it was
added later.

Hard times create strong men. Strong men create good times.
Good times create weak men. And, weak men create hard times.