Winchester Model 62A Pump (Slide) Action Rifle

The photo above shows a view looking down the model 62A from the top rear. Here you can see the insert in the rear sight, and the slotted screw that holds it in place. The insert is reversible, having a shallower notch on one side (on the bottom in this photo), in case you prefer to draw a finer bead.

The elevator for this sight is made of sheet metal, and the knurled round "knob" visible below the rear sight makes it easy to move, should you need to adjust the sight.

This seems like as good a time as any to note that this gun's serial number is stamped on the bottom tang, and on the bottom of the receiver at its front end.