Quote Originally Posted by Drew451 View Post
A slightly different rotating notch rear sight plate is common to many higher end Diana's. Right through to the late 80's at least. Pull and turn with the fingers easily.
A very nice Model 50 you have. Superb find.
Looks like no one imitated the front sight? Even Diana dropped it in the 1950’s? Probably wasn’t cheap, and also it does limit you to 4 posts, but at least you don’t loose them. Lol