This is an early New Old Stock Springfield 1903 rear sight unmarked as shown in photos. Note the concave elevation knob and the raised sight notch on the elevation bar. Sight shows no wear from use. Color is consistent throughout. This is the exact sight for sale. Elevation bar slides freely. Stored in grease. Elevation and Windage scale faces are bright. I believe this is a Springfield sight because it is not marked, but I’m not an ‘03 rear sight expert.