1 Original Model 1898 Complete Rear Sight, Unaltered (Still has squared corners on the head). This is the earliest possible M1898 Rear Sight. It has all of the rarest parts. A minty unaltered head, the ladder is smooth on both sides which goes along with the slide that is without the plunger used on the later models ( you can see this in the photo as it does not have the hole where the plunger shaft pokes through. The knob for the slide is without the slot added later. Those 4 parts are the hardest parts to find on a 98 sight.