These are original special order flat top rear sights for Winchester lever action rifles such as the 1873, 1892, 1894, 1895, and 1886. These do not have the semi-buckhorn ears like the standard rear sights but more of a flatter profile across the top to give the shooter a wider field of vision while sighting the gun. Over the years, many semi-buckhorn rear sights have been filed down but these are factory original as offered in the Winchester catalog at the turn of the century. We have four of these, all in excellent condition, with most of their original blue and complete with sliding elevators. Three have an adjustable aperture while one is solid with a static aperture.