077A-A081-Parker-Hale PH25B Adjustable Aperture Sight

Parker-Hale click-adjustable target aperture rear sight for competition shooting with adjustable diopter. Marked ?Parker-Hale? and ?PH25B?. Made for the .22lr. BSA International Mk11 target rifle. Complete and in excellent unused condition with matching dovetail mounting base and screws.