Rear Sight ORIGINAL Winchester No 24A Sporting Flat top. Height is 0.371 inches with a sliding elevator held in place by a screw on the back side of the sight blade. This sight was used on a number of Winchester rifle models including the 1866, 1873, 1876, 1886, 90, 92, 94, 95 and 1903, 04, 05, 07 and 1910.